AP Physics Review

Two bodies of equal mass are moving in circular paths at equal speed. The first body moves in a circle whose radius is twice that of the second. The ratio of the radial acceleration of the first body to that of the second is:

• 1 to 4

• 1 to 3

• 1 to 2

• 1 to 1

Tags

NGSS.HS-PS2-1

A car is moving along a straight horizontal road at a speed of 20 m/s. The brakes are applied and a constant force of 5000 N brings the car to a stop in 10 s. What is the mass of the car?

• 1250 kg

• 2500 kg

• 5000 kg

• 7500 kg

Tags

NGSS.HS-PS2-1

Two forces have magnitudes of 11.0 N and 5.0 N. The magnitude of their sum could NOT be equal to which of the following values?

• 16.0 N

• 9.0 N

• 7.0 N

• 5.0 N

A fisherman watches a dolphin leap out of the water at an angle of 35o above the horizontal. The horizontal component of the dolphin’s velocity is 7.7 m/s. Find the magnitude of the vertical component of the velocity.

• 4.4 m/s

• 6.3 m/s

• 11 m/s

• 5.4 m/s

A block of wood initially at rest slides down an inclined plane. Neglecting friction, the kinetic energy of the block at the bottom of the plane is:

• all converted into heat.

• less than its kinetic energy at the top of the plane.

• dependent on the materials of which the block is made.

• equal to its potential energy (with respect to the bottom of the plane) when it was at the top of the plane.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A 3.00 kg bucket of water is raised with an upward acceleration of 2.20 meters per second squared from a well by means of an attached rope. What is the tension in the rope?

• 30.2 N

• 33.3 N

• 36.6 N

• 39.0 N

Tags

NGSS.HS-PS2-1

A force, F, could be applied to a cart in a variety of directions as shown at right. Which of the applications of F would result in no work being done?

• A

• B

• C

• D

Three blocks (m1=1 kg, m2=2 kg, m3=3 kg) connected by cords are pulled by a constant force, F, of 18 N on a frictionless horizontal table. T2 is the tension in the rope between m2 and m3. What is T2?

• 3 N

• 6 N

• 9 N

• 12 N

Tags

NGSS.HS-PS2-1

An ice skater is rotating with her arms extended. When she pulls in her arms, her rate of rotation increases. No external torques act on the skater. Which of the following statements is true?

• Her moment of inertia increased.

• Her kinetic energy is conserved.

• Her angular momentum decreased.

• She does work when pulling in her arms.

Two separate simple pendulums are swinging back and forth. It is found that pendulum A has twice the frequency of pendulum B. Which statement could account for this difference?

• Pendulum B is twice as long as pendulum A.

• Pendulum B was released before pendulum A.

• Pendulum B is twice as massive as pendulum A.

• The length of pendulum B is four times the length of pendulum A.