The body is accelerating upward toward the center of the circle it traces out with magnitude
a = v ² / R
where
v = linear speed of the body
R = 3.4 m = radius of the circle it traces/length of the string
The only forces acting on it at the lowest point are the tension T of the string pulling upward on the body and weight W = mg of the body pulling it downward. By Newton's second law, we have
∑ F = T - mg = ma
Replace the acceleration with the expression from earlier and solve for v :
300 N - (17 kg) g = (17 kg) v ² / (3.4 m)
v ² = ((3.4 m) 300 N - (17 kg) g) / (17 kg)
v = √[ ((3.4 m) 300 N - (17 kg) g) / (17 kg) ]
v ≈ 5.16527 m/s ≈ 5.2 m/s
Please answer all of these questions and you will get the brain list
Answer:
1=900j
2=140j
3=5m
Explanation:
1,
work=force×displacement
w=450×2
w=900j
2,
w=f×s
w=70×2
w=140j
3,
w=f×s
200=40×s
200/40=s
s=5m
A ball at the top of a 25 meter hill has a mass of 18 kg. How much potential 1 poin
energy does it have?
What does the root cand mean in the word candescent?
The candescent quality of the room was improved by the southern exposure.
Answer:
Glowing
Explanation:
Calculate the energy absorbed when 13 kg of liquid water raises from 18°C to 100°C and then boils at 100°C.
Answer:
the energy absorbed is 4.477 x 10⁶ J
Explanation:
mass of the liquid, m = 13 kg
initial temperature of the liquid, t₁ = 18 ⁰C
final temperature of the liquid, t₂ = 100 ⁰C
specific heat capacity of water, c = 4,200 J/kg⁰C
The energy absorbed is calculated as;
H = mcΔt
H = mc(t₂ - t₁)
H = 13 x 4,200(100 - 18)
H = 4.477 x 10⁶ J
Therefore, the energy absorbed is 4.477 x 10⁶ J
Which statement best explains the difference between light waves traveling through a vacuum and light waves traveling through a medium?
Answer:
The statement which best explains the difference between the light waves travelling through a vaccuum and light waves travelling through a medium is -"When light waves travel through a vacuum, they travel faster than when they travel through a medium."
Explanation:
Light waves are faster in vacuum because The refractive index of vacuum is the lowest since there is no barrier in the way of light propagation in vacuum. Demonstrate that the maximum speed of light in vacuum.
In a vacuum, light flies at 186,283 mph. Light flies at 186,200 mph in the air, or 56 mph slower. In another medium, such as water, light travels at 139,712 mph, or around 3/4 of the speed of light in a vacuum.
LIGHT WAVES -: Light waves are a form of electromagnetic wave that includes both visible and invisible to the naked eye wavelengths on the electromagnetic spectrum. The average human eye can see light with wavelengths ranging from 390 to 700 nanometers, or nm.
Forms of light waves comprises of Radio waves , microwaves , infrared waves , visible light etc.
When light waves travel through a vaccume, they travel faster than when they travel through a medium
What is light wave?A light wave is an electromagnetic wave which travels through the vacuum of outer space. Light waves are produced by vibrating electric charges., An electromagnetic wave is a transverse wave which has both an electric and a magnetic component.
Light waves are faster in vaccum because the refractive index of vaccume is the lowest since there is no barrier in the maximum speed of light in vaccum.
In vaccum light travels at 186283 mph in air 186200 mph in other medium like water at 139712 mph.
Hence light waves travel through a vaccum, they travel faster than when they travel through a medium
To know more about light waves follow
https://brainly.com/question/14015797
Q: A spring of original length 10 cm, Stretches to 12 cm, when a Force of 40 N is applied to It. what is the extension of the spring when a Force of 26 N, is applied?
Answer:
4
Explanation:
In the following figure, a table of mass 0.44 Kg is pushed against an inclined surface with a 15 inclination angle. Find the amount of the horizontal component of the Weight
Answer:
W = 1.11 N
Explanation:
Given that,
Mass of a table, m = 0.44 kg
It is pushed against an inclined surface with a 15 inclination angle.
We need to find the amount of the horizontal component of the weight. The horizontal component of weight is given by :
[tex]W=mg\sin\theta\\\\W=0.44\times 9.8\times \sin(15)\\\\W=1.11\ N[/tex]
So, the amount of the horizontal component of the weight is 1.11 N.
Which of the following is NOT a kind of energy store?
nuclear
kinetic
magnetic
temperature
Answer:
Option D is your answer ☺️☺️. If I'm right so,
Please mark me as brainliest. thanks!!!
Answer:
tempruter
Explanation:
pls help meeee!!! will mark brainliest!!
Answer:
water
is missing in above equation
hope it helps
IIIIIIIIII neeeeeed helppppp again?
Answer:
The Principle of Progression
(I searched it up since I never learned this)
Explanation:
The principle of progression states that a person should start slowly and increase exercise gradually. Since Mandy is just getting started on her exercise routine, she should begin with a few workouts over a large span of time, then work her way up so she can do more workouts in a shorter span of time.
If the displacement of a particle is given by the formula S = 3t^3 - 20t^2 + 40t. Find (i) the displacement after 3 seconds (ii) the formula for the velocity at any time t (iii) the value of t when the particle is not moving (iv) the initial velocity of the particle (v) the formula for the acceleration at any time t (vi) the initial acceleration of the particle.
Answer:
At t = 0 S = 0
S = 3 * 3^3 - 20 * 3^2 + 40 * 3 after 3 sec
S = 3 * 27 - 20 * 9 + 120 = 21 after 3 sec
v = ds/dt = 9 * t^2 - 40 * t + 40 = 9 * 9 - 40 * 3 + 40 = 1
ds/dt = 9 t^2 - 40 t + 40 v at any time
If zero = 9 t^2 - 40 t + 40 then you need to solve the quadratic for t
a = ds^2 / dt^2 = dv /dt = 18 t - 40 for the acceleration at any time
At t = zero (the initial acceleration) a = -40
James went to the doctor for a check-up and found his weight to be 1,000 N. How much mass does James have?
Answer:
102.04kg
Explanation:
(1000kg*m/s^2)/(9.8 m/s^2)
1) Un perito fue encomendado para determinar si un trozo de metal muy parecido al oro de 0,75 kg. Y de volumen 340 cm3. Era en verdad dicho metal, use las características de la densidad de un cuerpo para ayudar al perito.
Answer:
Primero, sabemos que la densidad de el oro es:
Densidad = 19.3 g/cm^3
Sabemos que nuestro metal tiene una masa de 0.75 kg, y un volumen de 340 cm^3.
Primero deberíamos reescribir la masa en gramos, pues la densidad está escrita en gramos.
Sabemos que:
1 kg = 1000g
Entonces:
0.75 kg es 0.75 veces 1000g, esto nos da:
0.75kg = 0.75*(1000g) = 750g
Entonces tenemos:
masa = 750g
volumen = 340cm^3
Ahora debemos recordar que:
densidad = masa/volumen
Entonces la densidad de este metal es:
densidad = 750g/340cm^3 = 2.21 g/cm^3
Si la comparamos con la densidad del oro, podemos ver que esta es mayor.
Entonces podemos concluir que este metal no es oro.
A person lifts a 25 kg box of old sports equipment at an angle of 75 degrees to the vertical to a shelf 2.6 meters above. How much work was done by the person?
Answer:
164.87 J
Explanation:
From the question,
Work done (W) = mghcosθ........................ Equation 1
Where m = mass of the box, h = height, g = acceleration due to gravity, θ = angle to the vertical
Given: m = 25 kg, h = 2.6 meters, θ = 75°.
Constant: g = 9.8 m/s²
Substitute these value into equation 1
W = 25×9.8×2.6×cos75°
W = 164.87 J.
A race car starts at rest and accelerates north at 12.27 m/s2 for 3.19 seconds. What
is the car's final velocity?
Potential difference is measured in which units?
volts
amps
currents
watts
Answer:
The correct answer is A volts on edge 2021
Explanation:
What is the gravitational force that two objects would feel if they are 3.5 meters apart? Object 1 has a mass of 10x10^5 kg and object 2 has a mass of 3x10^5 kg?
Answer:
1.63 N
Explanation:
F = GMm/r^2
= (6.67x10^-11)(10x10^5)(3x10^5) / 3.5^2
= 1.63 N ( 3 sig. fig.)
Atmospheric pressure on that day is 1.0 multiply 10 to the power of 5 Pa. calculate the total pressure at the bottom of the pond
Answer:
Water pressure P=ρgh (density X acceleration due to gravity X height of water)
P=1000X9.8x3=29,400 N/m2 or Pascal
But there is air pressure over water which also adds to the pressure at the bottom of the pool.
Therefore,Atmospheric pressure over the water=1.01 x 105 N/m2
So the total pressure on the bottom of the pool = 29,400+ 101000 Pa
= 130,400 Pa
Explanation:
Find the energy of a 50kg object that is moving at 4m/s
A plane has a mass of 2,000 kg and is traveling 100 meters above the ground. What is the plane’s potential energy?
I NEED THE ACTUAL ANSWER!
Answer: 1964000 Joules
Explanation:
PE = mgh
5. A 10 kg ball is traveling at the same speed as a 1 kg ball. Compared to the 10 kg ball, the 1 kg ball has (2 points)
What is the relationship between stream and drainage basin
Electric current flows through paths called circuits. People often build circuits using wires, resistors, and batteries. A battery is a voltage source.
A circuit with which components has the highest current with the given voltages?
wires, a 9V battery, no resistors
wires, a 9V battery, a light bulb
wires, a 1.5V battery, no resistors
wires, a 1.5V battery, a light bulb
Answer:the answer is A. Wires, a 9v battery, no resistors
Explanation:
A wire with battery of the voltage of 9 volts with no resistor has the highest value of current. The ampere is the SI unit for electric current.
What is electric current?The pace at which electrons travel through a conductor is known as electric current. Electrons are tiny particles that reside within a substance's molecular structure.
Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.
The Equation of Ohm's Law
V=IR
If there is no resistor, the resistance in the circuit is zero, results in the highest value of electric current.
Voltage is directly proportional to the current. As high the value of voltage, the value of the electric current is high.
Hence, a wire with battery of the voltage of 9 volts with no resistor has the highest value of current.
To learn more about the electric current, refer to the link;
brainly.com/question/7643273
#SPJ2
BY what factor does the kinetic energy of a moving body change when its speed is reduced to half? please help i have an exam and i need an answer
Answer:
Kinetic Energy = 1/2 mass*velocity^2
K=1/2mv^2
Therefore if you reduce the speed of an object by 1/2, K reduced to 1/4 its value.
Which bar graph shows the reaction rates for a reversible reaction that has reached dynamic equilibrium?
THE ELECTROMAGNET SPECTRUM ONLY HAS WHICH SHAPE OF WAVE?
Answer: Transverse
Explanation: Transverse waves possess a vertical wave motion and a horizontal particle motion.
Light must enter the ______or sensor to be seen or detected. What is the missing word? Gets brainliest answer!
Answer:
It should be light sensor...but if not, maybe device? machine?.
Answer: X-ray
Explanation:
Im dum
a 500-kg car is parked 20 M away from a 600 kg truck. what is the gravitational force between the two cars? Show the 4 steps.
Answer:
600 kg
Explanation:
Answer: 5.0025 * 10^-8 N
Explanation:
[tex]F = \frac{Gm_1m_2}{r^{2} }[/tex]
F = gravitational force
G (is a constant) = 6.67×[tex]10^{-11}[/tex] N(m/kg)^2
m1 = mass of first object = 500 kg
m2 = mass of second object = 600 kg
r = distance between them = 20 M
[tex]6.67*10^{-11}N(m/kg)^2* \frac{500 kg*600 kg}{(20m)^2}\\6.67*10^{-11}N*\frac{m^2}{kg^2} * \frac{300000kg^2}{400m^2}\\6.67*10^{-11} N * 750\\5002.5 * 10^{-11} N \\5.0025 * 10^{-8} N[/tex]
A turtle moves at an average speed of 0.2m/S towards the finish line that is 80m away from the starting line. A rabbit,racing with the turtle,leaves the starting line 5.4 minutes after the turtle. The speed of the rabbit is 3.6km/h. Which one of them wins the race? Justify
Answer:
5.6mls
Explanation:
I wanna give points so my question,
What is gravity?
Answer:
An invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. ... Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass.
Explanation:
thx for the points :)
Answer:
gravity is the force that attracts a body toward the center of the earth or toward any other physical body having mass.
Explanation: