506 Answered Questions for the topic AP physics

Ap Physics Science Physics

11/02/20

Please help me thank you!
A 1.98-kg particle has a velocity (2.01 î − 3.05 ĵ) m/s, and a 3.01-kg particle has a velocity (0.94 î + 5.93 ĵ) m/s.(a) Find the velocity of the center of mass. ______ î +  ____ ĵ m/s(b) Find the... more
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Ap Physics Science Physics

11/02/20

Help me please?
Romeo (85.0 kg) entertains Juliet (47.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m away from Juliet, who is in the front of the boat. After the serenade,... more
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Ap Physics Science Physics

11/02/20

Help please with this problem?
A rod of length 20.00 cm has linear density (mass per length) given byλ = 50.0 + 20.5xwhere x is the distance from one end, and λ is measured in grams/meter.(a) What is its mass? _____g(b) How far... more
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Ap Physics Science Physics

11/02/20

can someone help with this please?
Four objects are situated along the y axis as follows: a 2.04-kg object is at +2.91 m, a 2.99-kg object is at +2.40 m, a 2.55-kg object is at the origin, and a 3.99-kg object is at -0.508 m. Where... more
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Ap Physics Science Physics

11/02/20

How can I solve this?
A 44.4-kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity... more
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Ap Physics Physics

11/01/20

Physics Question

You pull a 70-kg crate at an angle of 30 degrees above the horizontal. How hard do you have to pull to keep the crate moving with constant velocity if the ɱk = .4?
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Ap Physics

11/01/20

Physics Circular Motion
Young David, who slew Goliath, experimented with slings before tackling the giant. He found that with a sling of length 0.551 m, he could revolve the sling at the rate of 6.44 rev/s. If he... more
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Ap Physics Science Physics

11/01/20

How can I solve this?
Starting from rest, a 62.0 kg woman jumps down to the floor from a height of 0.640 m, and immediately jumps back up into the air. While she is in contact with the ground during the time interval 0... more
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Ap Physics Science Physics

11/01/20

How can I solve this?
A ball falls from height of 19.5 m, hits the floor, and rebounds vertically upward to height of 15.0 m. Assume that m ball = 0.215 kg.(a)What is the impulse (in kg · m/s) delivered to the ball by... more
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Ap Physics Science Physics

11/01/20

How can I solve this?
At one particular moment, a 19.0 kg toboggan is moving over a horizontal surface of snow at 4.10 m/s. After 9.00 s have elapsed, the toboggan stops. Use a momentum approach to find the magnitude of... more
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Ap Physics

11/01/20

Physics Circular Motion
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.32 × 106 m/s. (a) Find the central force acting on the electron as it revolves in a circular orbit of radius... more
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Ap Physics

11/01/20

Physics Circular Motion
A merry-go-round makes one complete revolution in 8.3 s. A 39.4 kg child sits on the horizontal floor of the merry-go-round 4 m from the center. Find the child’s acceleration. The acceleration of... more
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Ap Physics

10/29/20

If you hold the force constant and change the mass, what happens to the acceleration?
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Ap Physics Science Physics

10/29/20

Can someone please help me I'm stuck on this question?
A 1.20-kg object is held 1.00 m above a relaxed, massless vertical spring with a force constant of 315 N/m. The object is dropped onto the spring.(a) How far does the object compress the... more
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Ap Physics Science Physics

10/29/20

Can someone please help with my question?
A toy cannon uses a spring to project a 5.20-g soft rubber ball. The spring is originally compressed by 5.01 cm and has a force constant of 8.01 N/m. When the cannon is fired, the ball moves 15.9... more
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Ap Physics Science Physics

10/29/20

How can I solve this? Please Help!
Suppose your mass is 73.0 kg and you climb 40 stairs of height 18 cm in 18.0 s. What is your power output as you climb the stairs? _____ W
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Ap Physics Science Physics

10/29/20

How can I solve this question? Please Help?
A 40.5 kg box initially at rest is pushed 6.00 m along a rough, horizontal floor with a constant applied horizontal force of 150 N. If the coefficient of friction between box and floor is 0.300,... more
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Ap Physics Science Physics

10/29/20

How can I solve this please help?
A crate is given a push across a horizontal surface. The crate has a mass m, the push gives it an initial speed of 3.00 m/s, and the coefficient of kinetic friction between the crate and the... more
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Ap Physics Science Physics

10/29/20

How can I solve this please help?
A light, rigid rod is 65.2 cm long. Its top end is pivoted on a frictionless horizontal axle. The rod hangs straight down at rest with a small, massive ball attached to its bottom end. You strike... more
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Ap Physics Science Physics

10/29/20

How can I solve this please help?
A 19.0-kg cannonball is fired from a cannon with muzzle speed of 1 200 m/s at an angle of 38.0° with the horizontal. A second ball is fired with the same initial speed at an angle of 90.0°. Let y =... more
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Ap Physics

10/28/20

Physics- Angle Forces
Joe pushes down the length of the handle of an 11.1 kg lawn spreader. The handle makes an angle of 42.7 ◦ with the horizontal. Joe wishes to accelerate the spreader from rest to 1.33 m/s in 1.3 s.... more
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Ap Physics Physics

10/27/20

What is the centripetal acceleration of the bug?
You start an old record player and notice a bug on the surface close to the edge of the record. The record has a diameter of 30 cm and completes 78 revolutions each minute. What is the centripetal... more
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Ap Physics Physics

10/26/20

A 1500-kg car drives around a flat 200-m diameter circular track at 20 m/s. What is the net force acting on the car, in Newtons?
A 1500-kg car drives around a flat 200-m diameter circular track at 20 m/s. What is the net force acting on the car, in Newtons? (Round your answer to the nearest whole number and do not include... more
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Ap Physics Science Physics

10/24/20

Can someone help me with the question?
A 5.82-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.20 m/s and its y component of velocity is −3.12 m/s.(a) What is the kinetic energy of the object... more
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Ap Physics Science Physics

10/24/20

How do I solve this question? Help me please?
the beam 13.0 cm farther into the ground before coming to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to... more
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