Describe the energy transformations taking place as she walks back down the stairs
and stops at the bottom.​

Answer:

the law of force and accerleration

Explanation:

is the law where the acceleration of an object is directly related to the net force and inversely related to its mass

Answer:

The force that must be exerted at the other end is 102.08 N/m₂

Explanation:

Using Pascal's formula; P₁ = P₂

P₁ = F₁/A₁ = m*g/(πr²)

m = 1500 kg; g = 9.8 m/s², r = 24 cm = 0.24 m

P₁ = (1500 * 9.8)/(22/7 * 0.24 * 0.24)

P₁ = 81235 N/m²

P₂ = F₂/A₂

A₂ = πr² where π = 22/7; r = 2.00 cm = 0.02m

A₂ = 22/7 * 0.02 * 0.02 = 0.00126 m²

P₂  = F₂ / 0.00126 m₂

substituting in the formula  P₁ = P₂

81235 N/m² =  F₂ / 0.00126 m²

F₂ = 81235 N/m² * 0.00126 m²

F₂ = 102.08 N/m₂

Explanation:

Answer:Why does water stop flowing out of the top hole even before the water level falls ... Calculate pressure on the bottom of the pool due to the water. 3. ... 2. If the ratio of A2 to A1 was 100, what force would be required to lift a 10000 N car? ... A cylinder with a radius of 11 cm and a height of 3.4 cm has a mass of 10.0 kg. a.

Explanation:

Answer:Given A uniform horizontal beam with a length of 8.00 m and a weight of 200 n is attached to a wall by a pin connection ( allows rotation). Its far end is supported by a cable that makes an angle of 53 degrees with the horizontal. If a 600 n person stands on the beam at 2.00 m from the wall , find the tension in the cable

Now the force acting on the beam are the gravitational force of earth and weight attached to a wall is 200 N which acts at centre. Also force of person standing is 600 N and force exerted is r and tension is T , also torque due to r is zero because it acts at the pivot point. So r = 0

Torque due to tension in the rope is sin 53 x 8.00 x T.

Torque due to force is 2.0 m x 600 N

The weight of beam acts in the centre since the beam is uniform.

So we have

sin 53 x 8.00 x T - 2 m x 600 N - 4 x 200 N = 0

8 .00 x 0.8 x T = 1200 + 800

0.64 T = 2000 N-m

T = 2000 / 0.64

T = 312.5 N

Explanation:

The tension in the cable and the force exerted on the beam by the wall will be 312.5 N and 1200N respectively.

Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.

The given data in the problem is;

L is the length 5.00 m long,

[tex]\rm \theta[/tex] is the angle of 53.0°

d is the distance =  1.50 m

T is the  tension in the cable

F is the force exerted on the beam by the wall= ?

Torque due to tension in the rope is

[tex]\rm \tau = 8.00 \times sin 53^0 \times T[/tex]

Force due to the torque will be;

F= 2.0 m x 600 N

F= 1200 N

The net tension is found as on applying the static equilibirium equation;

sin 53 x 8.00 x T - 2 m x 600 N - 4 x 200 N = 0

8 .00 x 0.8 x T = 1200 + 800

0.64 T = 2000 N-m

T = 2000 / 0.64

T = 312.5 N

Hence the tension in the cable and the force exerted on the beam by the wall will be 312.5 N and 1200N .

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Answer:

50m/s

Explanation:

v = f*w

Answer:

50 ans..

Explanation:

Data :

v = ?

wavelength= 2.5 m

f = 20 Hz

Formula:

speed = (frequency )(wavelength)

Solution:

v = ( 20 )( 2.5 )

v = 50 metre per second Ans ...........

Answer:

Gravitational Potential Energy

Explanation:

Answer:

The correct answer is Separating soils by grain size. Among all the other choices, this is the aspect of soil characteristics in which a soil triangle is used for.

Explanation:

Answer:

C

Explanation:

Action and Reaction forces are equal in the opposite direction.

Answer:

Density = 11.11 kg/m³

Explanation:

Given the following data;

Mass = 40 kg

Dimensions = 30×4×3 = 360 cm³ to m³ = 360/100 = 3.6 m³

Thus, volume = 3.6 m³

Now, we can find the density;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

[tex]Density = \frac{mass}{volume}[/tex]

Substituting into the equation, we have;

Density = 40/3.6

Density = 11.11 kg/m³

Answer:

Power = 2 j/s

Explanation:

Power = Work / Time

= 20/10

= 2 j/s

Answer:2kwh

Explanation:

Answer:

Fin Lin = Fo Lo  Work = Work out where in = input and o = output

Fin / Fo = Lo / Lin = 30 / 60 = 1/2   (input force = 1/2 output force)

Lin + Lo = 3

Lo = 3 - Lin

1/2 = (3 - Lin) / Lin    from above

1/2 = 3 / Lin - 1

3 / Lin = 1.5   and Lin = 2

So the input length = 2 m and the output length = 1 m

Answer:

0.5m

Explanation:

v=f×lamda

v is 300m/s, f is 600Hz, lamda is ?

lamda=v/f

lamda=300/600

lamda =3/6=1/2m

If energy is conserved, then initial (PE + KE) = final (PE + KE). So, the correct option is A.

The law of conservation of energy states that, energy can neither be created nor be destroyed, but can be transformed from one form to another.

Here,

According to law of conservation of energy,

The total energy of an isolated system remains constant. That means, the total energy of the system in the initial state will be same as that in the final state.

The total mechanical energy is the sum of kinetic energy and potential energy.

TE = KE + PE

Therefore, the energy to be conserved in the system,

Initial TE = Final TE

So, Initial (KE + PE) = Final (KE + PE)

Hence,

If energy is conserved, then initial (PE + KE) = final (PE + KE).

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Answer:

I think D

Explanation:

if energy is added,it wont stay the same,I beleive D is the only one that makes since,sorry if wrong

Answer:

Explanation:

given=

v = 5m/s

distance = 25m

time= distance/ speed = 25/5

T= 5

and frequency = 1/T

= 1/5 = 0.2 Hz

hope this will help you

Answer:

Choice C

Explanation:

Answer:

13.7795276 Inches

Explanation:

Answer:

Ships can float because a ship is less dense than that of the water that it floats on.

Explanation:

Hope this helps!

Answer:

1.5 hour

Explanation:

Time = distance/speed

Time= 120/80 = 1.5 hour

Given values are:

As we know the formula,

→ [tex]\Sigma f = ma[/tex]

or,

→ [tex]\Sigma f = \frac{mv^2}{r}[/tex]

By putting the values, we get

         [tex]= \frac{52\times 8^2}{1.6}[/tex]

         [tex]= \frac{52\times 64}{1.6}[/tex]

         [tex]= 2080 \ N[/tex]

Thus the response above is appropriate.

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Answer:

Use F = m*a

Explanation:

If you are given the mass of the two different bodies, you could rearrange these equations, plug in the mass of the unknown body to find the unknown force

Answer:

defraction

Explanation:

when light passes from a less dense medium(air) into a dense medium(water) the light rays bend towards the normal. This makes the coin look closer

Answer:

.

Explanation:

,.....................................

The mechanical advantage of a machine is the factor by which it multiplies the force applied to the machine.

Answer:

The answer of the question is False

Answer:

U = 1.84 10⁻²⁷ J

Explanation:

Electric potential energy is

        U = k q₁q₂/ r

in this case the electric charge is

         q = 2 p

         q = 2 1.6 10⁻¹⁹

         q = 3.2 10⁻¹⁹ C

indicate the distance between the charges is 0.500 m

we calculate

         U = 9 10⁹  3.2 10⁻¹⁹  3.2 10⁻¹⁹ /0.500

         U = 1.84 10⁻²⁷ J

Answer:

Explanation:

Read forces directly from the graph.

Read displacements directly from the graph.

Use the area under the graph to find the work done by the force. This is equal to the kinetic or potential energy the object gains due to the application of the force.