AP Physics Review So Far

A tennis ball is thrown against a vertical concrete wall that is fixed to the ground. The ball bounces off the wall. How does the force exerted by the ball on the wall compare with the force exerted by the wall on the ball?

• The force exerted by the ball is greater.

• The forces exerted by the ball and the wall have the same magnitude.

• The force exerted by the ball is smaller.

• The relative magnitudes of the forces cannot be determined without knowing how long the ball and the wall are in contact.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

Blocks A and B, of masses m and 2m, respectively, are connected by a light string and pulled across a surface of negligible friction with a constant force F₁, as shown above. The acceleration of the blocks is a. The force of the string pulling block B forward has magnitude F₂. Which of the following claims correctly describes the relationship between the magnitude of the forces acting on the blocks?

• F₁ is equal to F₂.

• F₁ is greater than F₂.

• F₂ is equal to 3ma.

• F₂ is greater than 3ma.

Tags

NGSS.HS-PS2-1

A block is pulled along a surface of negligible friction by a spring scale that exerts a force F on the block. The mass of the block is 4kg, and the spring scale reads 10N. Which of the following free-body diagrams can be used to show the magnitude and direction of all the forces exerted on the block as it is pulled along the surface?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A car travels up a hill at constant speed. Which of the following diagrams best represents the forces acting on the car at this instant?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

How much work is done carrying a 10-N box horizontally across a floor for 8 m?

• 80 J
• 10 J
• 8 J
• 0 J

By what factor will the kinetic energy of an object increase if the velocity of the object is tripled?

• The kinetic energy will stay the same.

• 3

• 6

• 9

Which position shows the spring with maximum kinetic energy?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-2

Given the FBD, which of the following must be true?

• The frictional force must be accelerating the system to the left.

• The box must be accelerating to the right.

• The box must be moving to the right.

• The FBD is incorrectly drawn. This situation isn't possible

Tags

NGSS.HS-PS2-1

Which of the following statements is true about the image above?

• The accelerations of the blocks will vary according to their mass

• The net force acting on each block is the same

• The blocks will experience the same acceleration

• The 3m box will eat the 2m and the m boxes

Tags

NGSS.HS-PS2-1

A man standing on a scale in an elevator notices that the scale reads 40 newtons greater than his normal weight. Which type of movement of the elevator could cause this greater-than-normal reading?

• accelerating upward

• accelerating downward

• moving upward at a constant speed

• moving downward at a constant speed

Tags

NGSS.HS-PS2-1