AP Test Momentum and Conservation of momentum

A baseball of mass m (at rest) is struck by a bat so that it acquires a speed v. If t represents the duration of the collision between the bat and the ball, which expression determines the magnitude of the average force exerted on the ball?

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Tags

NGSS.HS-PS2-1

A 2.0 kg object is acted upon by a single force in the positive x direction as shown. What is the momentum change experienced by the object during the first 6s?

• 16.0 Ns

• 30 Ns

• 32 Ns

• 40 Ns

• 48 Ns

Tags

NGSS.HS-PS2-1

Block A and B have the same momentum and are moving on a frictionless surface. Block A has more mass than block B. How does the kinetic energy of block A compare to that of block B?

• Block A has more kinetic energy than Block B

• Block A has less kinetic energy than Block B

• Since the blocks have the same momentum, they must also have the same kinetic energy

• Since the blocks have constant speeds, they must have the same kinetic energy

Tags

NGSS.HS-PS2-2

A 50 kg boy runs at a speed of 10.0 m/s and jumps onto a cart that is initially at rest. If the speed of the cart with the boy on it is 2.50 m/s, what is the mass of the cart?

• 150.0 kg

• 175.0 kg

• 210.0 kg

• 260.0 kg

• 300.0 kg

Tags

NGSS.HS-PS2-2

A block of mass M is initially at rest on a frictionless floor. The block, attached to a massless spring with spring constant k, is initially at its equilibrium position. An arrow with mass m and velocity v is shot into the block. The arrow sticks in the block. What is the maximum compression of the spring?

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Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

Cart A: mass = 4 kg, vAi = +1.8 m/s and vAf = - 0.3 m/s

Cart B: mass = 6 kg, vBi = - 0.2 m/s and vBf = + 1.2 m/s

The data for the collision are given above. Assuming a closed system, is this an elastic or inelastic collision?

• Elastic collision: momentum stayed the same and kinetic energy was the same before and after the collision

• Elastic collision: momentum stayed the same

• Inelastic collision: momentum stayed the same, kinetic energy was the same before and after the collision, but the magnitudes of the velocities were not constant

• Inelastic collision: momentum stay the same, but kinetic energy was not the same before and after the collision

Tags

NGSS.HS-PS2-2

NGSS.HS-PS3-1

An arrow is shot through an apple. If the 0.1 kg arrow changes speed by 10 m/s during the collision (from 30 m/s to 20 m/s) and the apple goes from rest to a speed of 2 m/s during the collisions, then the mass of the apple must be

• 0.2 kg

• 0.5 kg

• 0.8 kg

• 1 kg

• 2 kg

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

A tennis ball of mass m rebounds from a racquet with the same speed v as it had initially as shown. The magnitude of the momentum change of the ball is

• 0

• mv

• 2mv

• 2mv sinθ

• 2mv cosθ

Tags

NGSS.HS-PS2-2

A billiard ball hits the side of a pool table at an angle Φ as shown in the top view above, and bounces away at the same angle, and with the same speed. Which vector indicates the direction of the net change in momentum of the billiard ball?

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Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

Three objects can only move along a straight, level path. The graphs below show the position d of each of the objects plotted as a function of time t. The magnitude of the momentum of the object is increasing in which of the cases?

• II only

• III only

• I and II only

• I and III only

• I, II, and III

Tags

NGSS.HS-PS2-2