Question 1

A force of $48.0$ newtons pushes a $ext{14.0-kilogram}$ case of water bottles across the surface of a table. The friction between the case of water bottles and the table surface is $ext{41.0 N}$ , as shown in the diagram.

What is the acceleration of the case of water bottles?

Accepted Answer

$0.5\ m/s^2$

Answer

$0.5\ m/s^2$

Answer

$0.5\ m/s^2$

Answer

$0.5\ m/s^2$

Question 2

A sledgehammer has a mass of $48.0$ kilograms. What net force, to the nearest whole newton, will a person need to apply to accelerate the sledgehammer at a rate of $ext{14.0-kilogram}$ ?

Be sure to use the correct place value.

Accepted Answer

14.0

Question 3

Four students designed and built air propelled rockets that were launched into the air. Their data are recorded in the table.

Which rocket had the greatest acceleration?

Accepted Answer

Rocket 3

Answer

Rocket 1

Answer

Rocket 2

Answer

Rocket 4

Question 4

A student pushes a $48.0$ kilogram bookshelf across a smooth floor with a net force of $ext{14.0-kilogram}$ . What is the approximate acceleration of the bookshelf?

Accepted Answer

$0.5\ m/s^2$

Answer

$0.5\ m/s^2$

Answer

$0.5\ m/s^2$

Answer

$0.5\ m/s^2$

Question 5

The diagram shows a duck swimming in a stream in the opposite direction the stream is flowing. The duck pushes against the water, so the water pushes the duck forward with $48.0$ newtons of force. The water also exerts $ext{14.0-kilogram}$ newtons of resistive force against the duck.

Which statement best describes the resulting motion of the duck?

Accepted Answer

The duck will continue moving in its current direction.

Answer

The duck will stop moving.

Answer

The duck will stop and then start moving again.

Answer

The duck will move in the direction that the stream is flowing.

Question 6

A mother and daughter press their hands together and then push apart while ice skating.

Immediately after they push away from each other, how does the motion of the mother and daughter change?

Accepted Answer

Both move backward, but the daughter moves with a greater acceleration.

Answer

The mother moves forward, and the daughter moves backward with a greater acceleration.

Answer

Both move forward, but the mother moves with a greater acceleration.

Answer

The mother moves backward, and the daughter moves forward with a greater acceleration.

Question 7

The diagrams show forces acting on a toy car as it moves to the right. Which diagram shows the toy car that will most likely accelerate to the right based on these conditions?

Accepted Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/8b193bd81e146df405485bb0f72eeb1af6cf5cbe.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/6951e7fde890c0e089cb1b9182fae1c1e2e94185.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/a35199d0b9ce9a3d7c1444c7e14a2f16d0a91467.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/164955a82ba3bbb1d1070969a4174216dbbe4914.png

Question 8

Students use a cart and some cargo to investigate acceleration. The diagram shows the available carts, each cart’s mass, and three types of cargo that can be used in the investigation. The wheels on all three carts are identical.

If an identical force is applied to all the combinations of cart and cargo, which table shows the combination that produces the least acceleration and the combination that produces the greatest acceleration?

Accepted Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/eefdad9bf9f6f27e144a2d6c115eb4db024ae3ae.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/4252f565a9dac29ad8a5aadb1dd77d6a0714884f.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/5bae892b0879a43ab73a3bc0b56332fbca64bf95.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/1b81460556afdc2e00d10995611dd41ec301bd91.png

Question 9

The diagram shows a person applying an action force to a diving board.

Which statement best applies to the reaction force?

Accepted Answer

The reaction force acts in the direction opposite to the action force.

Answer

The reaction force is not as large as the action force.

Answer

The reaction force acts in the same direction as the action force.

Answer

The reaction force is greater than the action force.

Question 10

A ball rolls along a flat surface and slowly comes to a stop. Which statement best describes the reason for the ball’s change in motion?

Accepted Answer

The ball’s velocity decreases because of the force of friction.

Answer

The force that keeps the ball rolling slowly decreases.

Answer

The force of gravity gets stronger as the ball slows down.

Answer

The ball’s inertia is greater than the force applied to the ball.

Question 11

A student bounces a basketball off the gym floor.

Which statement correctly describes the action-reaction force pair that causes the ball to bounce?

Accepted Answer

The gym floor pushes up on the ball as the ball pushes down on the floor with an equal amount of force.

Answer

The gym floor pushes up on the ball with a greater amount of force than the ball pushes down on the floor.

Answer

The gym floor pushes up on the ball as gravity pulls down on the ball with an equal amount of force.

Answer

The gym floor pushes up on the ball with a greater amount of force than gravity pulls down on the ball.

Question 12

The mass, applied force, and frictional force for four carts are shown in the table.

Part A

Based on the data table, which cart has the lowest acceleration?

Accepted Answer

X

Answer

W

Answer

Y

Answer

Z

Question 13

Part B

Which statement BEST explains the correct answer to Part A (Cart X)?

Accepted Answer

The cart will have the lowest acceleration if it has a larger mass and has the least difference between its applied force and friction.

Answer

The cart will have the lowest acceleration if it has a larger mass and its applied force and friction have the greatest sum.

Answer

The cart will have the lowest acceleration if it has a smaller mass and its applied force and friction have the greatest sum.

Answer

The cart will have the lowest acceleration if it has a smaller mass and has the least difference between the applied force and friction.

Question 14

A plastic tube is arranged on a lab tabletop as shown. A small sphere enters one end of the tube with enough speed to come out the other end of the tube.

Accepted Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/60ac6085a1fda1c729bb1167a38132c978d64aa5.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/a878cfd098429902d2a338e2ec33b85f739ddcaf.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/0c8245d07f5c421cda967391ede20b1cb163d34c.png

Answer

https://uploads.quizalize.com/aba1625c-fc9b-40e6-8394-fb29f3ac57c7/question/367a9d6dcdfa0a723331fd1604211e6c2a2cc7a7.png

Question 15

A $48.0$ block on a flat surface is pushed rapidly and then released. After release, the block slides for a short distance and comes to a stop.

Which option best identifies the forces that directly affect the block’s horizontal motion before and after it is released, and correctly describes their effects?

Accepted Answer

Before: Push and friction (push speeds up; friction opposes motion). After: Friction only (opposes motion until the block stops).

Answer

Before: Push only (speeds it up). After: Gravity only (slows it down).

Answer

Before: Normal force and gravity (speed the block up). After: Normal force only (slows it down).

Answer

Before: Friction only (speeds it up). After: Push and friction (both slow it down).

Question 16

A photograph of a bird perched on a fence post is shown.

Which description best identifies the action-reaction pair between the bird and the fence post?

Accepted Answer

Action: The force of the bird on the fence post

Reaction: The force of the fence post on the bird

Answer

Action: The force of the bird on the wires

Reaction: The force of the wires on the fence post

Answer

Action: The force of the wires on the fence post

Reaction: The force of the fence post on the bird

Answer

Action: The force of the fence post on the bird

Reaction: The force of the bird on the wires

Question 17

When a coin is tossed in the air, it travels upward, gradually slows down, momentarily reaches zero speed, then moves back downward with increasing speed. Which statement best explains this change in the coin’s motion?

Accepted Answer

The force of gravity causes the coin to change its velocity.

Answer

The coin’s inertia decreases on the way up and increases on the way down.

Answer

The action-reaction force pair of gravity and the applied force cancel each other.

Answer

The coin remains in its state of upward motion until the force of friction acts upon it.

Question 18

A steel ball is at one end of a box that is moving forward as shown. The box suddenly stops.

According to Newton’s first law, what happens to the steel ball just after the box stops?

Accepted Answer

Because of inertia, the ball continues rolling forward at the same speed.

Answer

Because of friction, the ball continues rolling forward at the same speed.

Answer

Because of friction, the ball rolls forward at an increased speed.

Answer

Because of inertia, the ball rolls forward at an increased speed.

Question 19

A skater pushes off a wall and skates backward for a few meters before stopping.

Which statement best describes an action–reaction force pair in this situation?

Accepted Answer

The wall pushes on the skater when the skater pushes on the wall.

Answer

The wheels slow down, and the skater stops.

Answer

The skater exerts a force on the wall, and the wheels exert a force on the floor and begin to turn.

Answer

The friction of the floor decreases when the wheels roll on the floor.

Question 20

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

Accepted Answer

The forces acting on the rock are all balanced.

Answer

There are no forces acting on the rock.

Answer

The only force acting on the rock is directed toward the sidewalk.

Answer

The sidewalk exerts an unbalanced force on the rock.

Question 21

A pitcher throws a ball toward a player holding a softball bat. The player uses the bat to hit the ball. The bat applies a 10-newton force to the ball.

Which statement correctly describes the reaction force between the bat and ball?

Accepted Answer

The reaction force is the force of the ball on the bat.

Answer

The reaction force is the force that causes the ball to move toward the bat.

Answer

The reaction force is the force applied to the bat by the player holding the bat.

Answer

The reaction force is the force that pulls the ball toward the ground.

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