Air moves across a warm body of water and rises in the atmosphere. This heat is most likely transmitted by which of the following? • Convection only • Radiation only • Convection and conduction • Radiation and conduction

Answer:

For the system of forces to be in equilibrium, the vector sum of the forces must be equal to zero. Therefore, we can set up the following equation:

(2i-j+k) + (3i+4j+4k) + (5i+3j+3k) = 0

We can also express the force vectors in terms of the position vectors of the points at which they act as follows

F = (3i+2k)×(2i-j+k) + (4i-5j+ak)×(3i+4j+4k) + (-4i-2j+4k)×(5i+3j+3k) = 0

Expanding and simplifying the equation we get

3i+2k - 2j + k - 4i +5aj +4k -5j +4k +5i +3j -3k = 0

-i +3j +3k +5aj = 0

Therefore, a = -1/5

The value of a is -1/5.

The concept of Search, Setup, and Smooth applies to motorcycle riding in the following way:

Search: This refers to the rider's ability to scan the road ahead and anticipate potential hazards, such as turns, traffic, and other obstacles. This is essential for safe riding as it allows the rider to make adjustments to their speed, position, and trajectory in advance.

Setup: This refers to the rider's body position and the setup of the motorcycle. This includes the rider's posture, the position of their feet on the pegs, and the position of their hands on the handlebars. A proper setup allows the rider to maintain stability and control of the motorcycle.

Smooth: This refers to the rider's ability to make smooth and controlled movements on the motorcycle. This includes smooth braking, accelerating, and turning. Smooth riding helps to maintain stability and control, and reduces the risk of accidents.

The Search, Setup, and Smooth concept is a useful framework for thinking about motorcycle riding, as it highlights the importance of awareness, body position, and control in maintaining safety and stability on the road.

In summary,  It emphasizes the rider's ability to anticipate hazards, maintain proper posture and motorcycle setup, and make smooth controlled movements.

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The formula to convert the speed given in meter per second to kilometer per hour is m/s = 18/5 km/h.

The formula to convert the speed of kilometers per hour into the meters per second can be found as,

Let us say,

S km/h is the speed of the object, If we simply just put the value of the distance and time in the required quantity, we will get our results. so, we will put,

1 km = 1000 m.

1 hour = 3600 seconds.

S km/h = S 1000/3600 m/s

S km/h = S 5/18 m/s

18/5 km/h = m/s

So, the speed of the object can be converted by using the formula, 18/5 km/s = m/s.

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The additional heat causes the kinetic energy of some of the liquid molecules to Increase So they can more easily escape into the gas phase.

When we add heat to the water immediately the temperature does not increase as before increasing the temperature the Kinetic Energy of molecules of water increases first and the heat is used for the same for increasing the temperature.

And As a result, the temperature of the boiling water remains constant. since some of the liquid water changes to gas, the amount of liquid water is. And the same phenomenon occurs when the water is boiling is starts becoming vapor instate of increasing the temperature it changes its state from liquid to gaseous.

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Buoyancy Force is the reason for the larger the diameter as the Larger the diameter larger the volume of log rolling and the higher the Buoyancy force which leads to floating the participants.

The floating of any dogy depends upon the Buoyancy force that the body is having or we can say the force which is applied on the water's surface to float on it. And However, Buoyancy depends on three things.

1. Gravitational pull(g)- the force applied by the planet to pull/attract ant mass towards itself. in the case of the earth, it is fixed which is 9.8 ms^-2.

2. The density(p)- It is the mass per volume of any liquid In the case of distilled water it is 997 kg/m³. It may barry for ocean water.

3. Volumn of the body(v)- It is the volume of the body which is floating on water.

So fb =  g*p*v where fb( Buoyancy force) is directly proportional to the volume of the body.

So the Greater the volume of the body higher it will float.

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This is a physics problem involving Coulomb's Law, which states that the force between two point charges is given by the equation F = (k * q1 * q2) / r², where k is the Coulomb constant, q1 and q2 are the charges, and r is the distance between the charges.

To find the position of charge 3 to the right of charge 1, we need to find the value of x³,r such that the net force on charge 3 is zero. This is because if the net force on charge 3 is not zero, it will accelerate and move away from its current position.

Similarly, to find the position of charge 3 to the left of charge 1, we need to find the value of x3,l such that the net force on charge 3 is zero.

The exact value of x3,r and x3,l will depend on the values of q1, q3 and the distance from charge 3 to charge 1.

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The parametric equation for the line of sight between the tanks can be represented as: x(t) = 385 + 410t, y(t) = 870 - 245t, z(t) = 567 + 30t

The line of sight between two points can be represented as a vector that starts at one point and ends at the other point. To find the parametric equation of the line of sight, we can subtract the starting point from the ending point to find the direction vector and then add it to a starting point multiplied by the parameter 't'.

Given that tank A is positioned at point (385, 870, 567) and tank B is positioned at point (795, 625, 597), the direction vector can be calculated as follows:

(795, 625, 597) - (385, 870, 567) = (410, -245, 30)

x(t) = 385 + 410t,

y(t) = 870 - 245t

z(t) = 567 + 30t

The parameter 't' can have any real value and determines the position along the line of sight.

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The spring constant can be calculated as: 12.51 N.

The formula for calculating the period of oscillation is written as the following:

[tex]T=2\pi \sqrt{\frac{m}{k} } \\[/tex]

m is the mass of the spring.

k is the spring constant.

Making the spring constant "k" the subject of the formula will give us the following expression;

[tex]k=4\pi ^{2} \frac{m}{T^{2} } \\[/tex]

Get the period of oscillation "T"

T= 1/f

frequency "f" can express the number of oscillations completed in one second.

If a student with a stopwatch finds that 12 oscillations take 15.0 s, the number of oscillations in one sec will be 9/14 = 0.64 osc.

Period T = 1/0.64 = 1.56sec

Get the required spring constant

[tex]K=4\pi ^{2} \frac{m}{T^{2} } \\k= 4(3.14)^{2}\frac{0.13}{0.64^{2} } \\[/tex]

K= 12.51 N

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Answer: Tim gains a potential energy of 3227.93 Joules.

Explanation:

Tim, with mass 76.6 kg, climbs a gymnasium rope a distance of 4.3 m. The acceleration of gravity is 9.8 m/s². How much potential energy does Tim gain?

Data:

m = 76.6 kg

h = 4.3 m

a = 9.8 m/s²

Ep = ?

To calculate potential energy, we have the formula

Where

Since it asks us to calculate Tim's potential energy, we should not do formula clearance.

Therefore, we substitute data in the formula and solve, then

Ep = 76.6 kg × 9.8 m/s² × 4.3 m

Ep = 3227.93 kg × m/s² × m

Ep 3227.93 N × m

Ep = 3227.93 Joules

Tim gains a potential energy of 3227.93 Joules.

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The statement about crate that is true is that D. The crate will not move.

Force is any interaction that, when unopposed, will change the motion of an object. The maximum force that static friction can exert on the crate is

μsFN = μsFw =

μs mg = (0.4)(100 kg)(10 N/kg)

= 400 N

Since the force applied to the crate is only 344 N, static friction is able to apply that same magnitude of force on the crate, keeping it stationary. [B is incorrect because the static friction force is not the reaction force to F; both F and Ff (static) act on the same object (the crate) and therefore cannot form an action/reaction pair.]

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Complete question: A crate of mass 100 kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A force F of magnitude 344 N is then applied to the crate, parallel to the floor. Which of the following is true?

A. The crate will accelerate across the floor at 0.5 m/s2.

B. The static friction force, which is the reaction force to F as guaranteed by Newton’s third law, will also have a magnitude of 344 N.

C. The crate will slide across the floor at a constant speed of 0.5 m/s.

D. The crate will not move.

E. None of the above

Hence option D is the correct choice.

The right statement is that the crate won't move.

Any interaction that alters an object's motion while it is unopposed is referred to as force. The crate can only withstand a maximum force of static friction of

μsFN = μsFw =

μs mg = (0.4)(100 kg)(10 N/kg)

= 400 N

The box is subjected to a force of just 344 N, therefore static friction may exert the same force, holding the crate immobile. [B is erroneous since F and Ff (static) operate on the same object, the crate, and so cannot form an action/reaction pair. F and Ff (static) are not the response force to F.]

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Note: The correct question would be as bellow,

A crate of mass 100 kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A force F of magnitude 344 N is then applied to the crate, parallel to the floor. Which of the following is true?

A. The crate will accelerate across the floor at 0.5 m/s2.

B. The static friction force, which is the reaction force to F as guaranteed by Newton’s third law, will also have a magnitude of 344 N.

C. The crate will slide across the floor at a constant speed of 0.5 m/s.

D. The crate will not move.

E. None of the above

The statement I ,II,III are the correct statement which must be be included in an investment advisory contract under nasaa rules .

State and provincial securities regulators in the United States, Canada, and Mexico are represented by the North American Securities Administrators Association (NASAA). Members of NASAA issue licences to businesses and their representatives, look into infringements of federal, state, and local laws, bring legal action when necessary, and inform the public about investment fraud. Members of NASAA take part in information exchange and multi-state enforcement activities through the association. According to NASAA regulations, the advice contract must include:

•Description of the services offered; •Term of the contract; •Formula for calculating fees; •Amount of prepaid fees to be returned if contract is terminated early; •No contract assignment is allowed without the customer's consent; •Whether the contract gives the adviser discretionary authority; and •Disclosure that the fee for managing equity securities may be higher than the fee for managing debt securities.

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Question :

Which of the following must be included in an investment advisory contract under NASAA rules? I The fact that prepaid fees will not be returned if the contract is terminated early

II The fact that assignment of the contract is only permitted with customer consent

III Whether the contract grants discretionary authority to the adviser

IV Disclosure that the fee for managing fixed income securities may be higher than for managing equity securities

A. I and II only

B. III and IV only

C. I, II, III only

D. I, II, III, IV

The expression that represents the scenario forty-five seconds after a bowl begins to leak, the bowl is losing 0.28 ounces of liquid per second would be l(t) = 0.28t.

When a bowl begins to leak, it can be represented mathematically as a function of time, l(t). In this case, the bowl is losing 0.28 ounces of liquid per second, so after 45 seconds, the total amount lost would be 0.28 x 45 = 12.6 ounces.

This function can be used to calculate the amount of liquid lost over any given amount of time, depending on the rate of the leak. It is important to note that this calculation only applies to liquids with a known rate of flow.

The bowl's liquid level over time can be represented by the expression l(t) = 0.28t. This expression calculates the amount of liquid lost from the bowl each second.

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The mesh current method, also known as mesh analysis, is a technique for solving planar circuits for currents (and, indirectly, voltages) at any point in the electrical circuit.

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Light refraction in spherical lenses & the lens maker formula are the notions that should be applied to the problem at hand. Utilize the lens mfg rule to get the fov of fixed lens & it verify if it is a high or low length.

A optical lens with such a contour that allows light beams to converge in diverge is called a spherical lens, also referred to as a singlet. One reason why spherical lenses are among the most popular ones is that they can project pictures onto the sensor with changing their aspect ratios.

It's an optical apparatus that the light rays pass through to converge / diverge before communicating. Thus, convex or convergent lenses and concave or divergent lenses are the two main categories of spherical lenses.

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i think it also doubles in area

If we assume that the radius of Earth is 6,4 x 10° m and the acceleration of gravity is 9.8 m/s®, than the mass of Earth's atmosphere is 5.322 * 1016 kg.

What is pressure ?

The magnitude of force applied to a certain region is referred to as pressure. So either a strong force or a strong force applied over a short area can cause a lot of pressure (or do both).

Why does air pressure exist?

The atoms and molecules that comprise the many layers of the atmosphere are continually moving in arbitrary directions. Despite their modest size, when they hit a surface, they apply pressure that humans perceive as a force.

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When the volume of a gas is decreased at a constant temperature the pressure increases because the molecules a.  Strike the unit area of the walls of the container more often.

We need to keep in mind that the kinetic energy or Speed of molecules of ideal gases depends on upon temperature and as the temperature increases the Kinetic energy of molecules increases.

So at constant pressure, the rest of the reasons(Options) mentioned can not increase.

Let's take an example of a small area on the surface or wall of the container. earlier when the volume was large, it had a lower probability of being hit by a molecule but now space is small, so it will be hit by more molecules so, high pressure will be generated on this area.

which results in pressure increases.

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Explanation:

A spiral wishing well can be a good representation of a gravitational field in the sense that it demonstrates how objects are attracted to a central point, which is similar to how objects are attracted to a massive object in a gravitational field. The well also shows how the force of gravity increases as objects get closer to the center, which is consistent with the inverse square law of gravity. However, the well is an incorrect representation of a gravitational field in the sense that it is not a three-dimensional representation of the field, but rather a two-dimensional representation. Additionally, the well does not take into account the fact that gravity is a force that acts between all objects with mass, not just those that are close to a central point.

When the proton and electron enter the electric field that is pointed to the right, the proton will be deflected to the right and the electron will be deflected to the left. This is because the proton has a positive charge and the electron has a negative charge, and opposite charges are attracted to each other. The proton and electron will move at the same speed because the electric field does not affect their speed, only their direction of motion.

According to Einstein's theory of general relativity, the orbit of Halley's Comet is determined by the curvature of spacetime caused by the mass of the sun and other celestial bodies. The comet follows an elliptical orbit around the sun, with the sun at one of the foci of the ellipse. The shape of the orbit is determined by the mass of the sun, the distance of the comet from the sun, and the velocity of the comet.

The period of the orbit of Halley's Comet is 76 years, which means that the comet takes 76 years to complete one orbit around the sun. This period is determined by the distance of the comet from the sun, the mass of the sun, and the velocity of the comet. The further the comet is from the sun, the longer the period of its orbit. As the comet approaches the sun, its ices start to vaporize and create a bright tail that can be seen from Earth.

In summary, Einstein's theory of general relativity explains that Halley's Comet only appears every 76 years because of the shape of its orbit around the sun, which is determined by the mass of the sun and the distance of the comet from the sun, as well as the velocity of the comet. The orbit is an elliptical one and the distance from the sun causes the vaporization of ices which make the tail visible from Earth.

If a mass slides down an incline, and the slope is frictionless, the gravitational potential energy is transformed to kinetic energy as it descends.

In physics, an object's kinetic energy is the energy it has as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a certain velocity. The body retains its kinetic energy after gaining it during acceleration until its speed changes. Kinetic energy is the energy that an item has as a result of its movement. If we wish to accelerate an item, we must apply force to it. Using force demands us to put in effort. After work is completed, energy is transferred to the item, and the thing moves at a new constant speed.

Here,

When a mass slides down an incline with no friction, its gravitational potential energy is converted to kinetic energy as it falls.

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The magnitude of the velocity of the stone is less than that of the point of contact.

The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The metre per second (m/s) is the accepted unit of velocity magnitude (also known as speed). Alternately, the magnitude of velocity can be expressed in centimetres per second (cm/s). The velocity is the rate at which a given displacement changes. By figuring out the displacement to total time ratio, it may be calculated. The same as for speed, "m/s" is the SI unit for velocity. Velocity is a vector, whereas speed is a scalar. The letters v (italic) stand for velocity and v for speed (boldface). A bar appears over the symbol for average values.

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The problems ask to find and plot z[n] = x[2–2n] using [tex]a^{u[n]}[/tex] the function, reconstruct a[n] using linear interpolation and time scaling transformations, and find no and ni such that [n] = p[n+ni) is odd and sketch x[n] for the signal p[n] = u[n+ 7] – u[n+ 3] – u[n + no] + u[n +2].

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The question is -

For problems asking for a sketch, be sure to label heights and times. Show intermediate steps of your work. 1. Combinations of transformations: Let x[n] = a^u[n], where a > 1, find and plot z[n] = x [2–2n). 2. Example of noninvertible transformations: The signal x[n] and two series of time scaling transformations for x[n] are provided below. Try to reconstruct a[n] with each series of transformations. Are both series of transformations invertible? Use linear interpolation if you need to and write down the general formula for calculating the interpolated values. x[n] n -2 -1 0 1 2 3 4 5 5 x[3n] x/r/3] x[n/3] x[n] x[n] x[n/3] x[3n] x[n] x[n] 3. Even/Odd + Step Function: For the signal p[n] = u[n+ 7] – u[n+ 3] – u[n + no] + u[n +2], find no and nį such that [n] = p[n+ni) is odd and sketch x[n].

A linear spring with a spring constant of 77.2 N/m would be the best choice to most closely reach the targeted launch speed of 12.6 m/s.

To calculate the spring constant needed to reach the target launch speed, and determine the elastic potential energy stored in the spring. This is equal to the spring constant multiplied by the square of the displacement of the spring E = 1/2 kx². We then use this value to calculate the kinetic energy of the object at launch KE = 1/2 mv². Finally, we can use the conservation of energy to solve for the spring constant k = 2(KE)/x².

In this problem, the mass of the object is 1 kg. The target launch speed is 12.6m/s. Putting these values into the equation above, we can calculate the spring constant needed to reach the target launch speed,

k = 2(1/2 (1) (12.6²)) / (1²)

k = 77.2 N/m

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The weight of the cylinder in pounds is 26.45 lbs.

To determine the weight of the cylinder in pounds, we first need to calculate its volume. The volume of a cylinder is given by :

V = πr²h

where,

r = the radius

h = the height (or length) of the cylinder.

Given the radius and length, we can substitute these values into the formula to get:

V = π * (0.04 m)² * (0.11 m) = 0.001539 m³

Since the mass density of steel is 7850 kg/m3, we can multiply the volume by the mass density to find the mass of the cylinder:

mass = 7850 kg/m³ * 0.001539 m³

mass = 12 kg

To convert this mass to pounds, we can multiply it by 2.20462 (1kg = 2.20462 lbs)

12 kg * 2.20462 = 26.45 lbs

Hence, the weight of the cylinder in pounds is 26.45 lbs.

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The box will go 7.5 meter before it stops.

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Initial speed of the box = 10 m/s.

Final speed of the box = 0 m/s.

Deacceleration of the box = (40 ÷ 6) m/s² = (20/3) m/s²

Hence, distance travelled  before it stops = u²/2a

= 10²/(2 ×20/3) m

= (100 × 3)/(2 × 20) m

= 7.5 m.

So, the box will go 7.5 meter before it stops.

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The  fundamental frequency of the String is 177.42 Hz.

Given,

The Tension (T) in the String is 765 N.

Steel wire length (L) is 0.900 m

Mass of the string (m) is 6.75 g = 6.75 * 10^-3 kg.

Frequency of the string = n *(Velocity of the wave on the String/(2L) )

Velocity of the wave on the string  is : V = [tex]\sqrt{\frac{T}{m/L} }[/tex]

Putting  these values in above equation we get : V = 319.37 m/s

For Fundamental Frequency n = 1

Frequency = V / 2L

f = 319.37 / (2*0.9)

f = 177.42 Hz

So, the  fundamental frequency of the String is 177.42 Hz.\

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The piston is the most important part of the brake caliper, which is a crucial part of the entire brake system. In order to stop your car, pistons must force the brake pads to make contact with the brake rotor.

The parking brake or emergency brake is typically fastened to the back wheels of a vehicle. The parking brake is typically connected to the rear drum brakes on vehicles with them using cables, as seen in Figure 14-10. Integral parking brakes are what they are known as.

It is a "motor-on-caliper" technology that operates the caliper without the use of a separate parking cable by integrating an actuator into the caliper located on the back wheel. The existing water/foot parking lever has been eliminated, and now a single button can be used to accomplish the parking function.

For those who are unaware, a parking brake that is integral means that your caliper piston serves two purposes. When you push the brake pedal, pressure is first applied to the brake pads. Second, when you use the parking brake, a ratchet mechanism applies pressure.

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The given statement is true.

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The rate at which the velocity changes is referred to as average acceleration. To determine the average acceleration of anything, we divide the change in velocity by the amount of time that has passed.

We refer to an object as accelerating when its velocity changes. As a result, acceleration is the rate at which a velocity changes over time. Acceleration is the common term used to describe an increase in speed.

For instance, the average acceleration of a crazy ball would be 20 cm/s/s if its velocity increased from 0 to 60 cm/s in 3 seconds. The marble's velocity will therefore rise by 20 cm/s per second as a result. You can better comprehend the operation by using the table below:

Note that an overview was given as the complete question wasn't found.

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The density of the small spheres with a diameter of 1.05mm and a terminal velocity of 2.34 cm/s is 42.97m/s³.

Density is a measurement which compares the amount of matter occupied by an object with its volume. An object with much matter in a certain amount of volume has high density. Whereas, an object with a little matter in the same amount of volume has a low density.

We know that density of water,

σ = 1.00 × 10⁻³ kg/m³ and coefficient of viscosity for water, η = 10⁻³ Pa.s

Given,

Terminal speed, v = 2.34 cm/s = 0.0234 m/s

Radius of sphere, r = d/2 = 1.05/2 = 0.525mm = 0.0005m

Using the formula of terminal speed,

v = 2(ρ − σ)gr²/ 9η

0.0234 = 2(ρ - 1.00 × 10⁻³) × 9.8 × 0.0005²/ 9 × 10⁻³

0.0234 = 2(ρ - 1.00 × 10⁻³) × 9.8 × 0.00000025/ 9 × 10⁻³

0.0234 = 2(ρ - 1.00 × 10⁻³) × 0.00000245/ 9 × 10⁻³

0.0234 × 9 × 10⁻³/ 2 ×  0.00000245 = ρ - 1.00 × 10⁻³

0.2106× 10⁻³/ 0.0000049 = ρ - 1.00 × 10⁻³

0.0002106/ 0.0000049 = ρ - 1.00 × 10⁻³

42.97 = ρ - 1.00 × 10⁻³

ρ = 42.97m/s³

Therefore, the density of the small spheres is 42.97m/s³.

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To prevent the pulley from turning, 1.103 kg of hanging mass must be applied to the cord.

the cord's torque

It is necessary for the torque in the cord caused by the sliding mass to equal the torque caused by the hanging mass in order to prevent the pulley from turning.

These steps are used to compute the torque:

1 = 2, F1r1 = F2r2, m1gsin()r1 = m2gr2, m1sin()r1 = m2r2, and m2 = m1sin()r1/r2, respectively.

where m1 is the sliding mass.

The inner radius of the pulley is r1.

The angle of inclination of the plane, shown by r2, is the pulley's outer radius.

In order to prevent the pulley from rotating, 1.103 kg of hanging mass must be applied to the cord.

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