Forces and Motion Review Part 2

Which statement best describes what will occur when two boys with different weights collide at the carnival?

• The lighter boy will exert more force on the other boy because objects with less mass will accelerate.

• The heavier boy will bounce in the same direction as the force they collided with.

• The lighter boy will bounce off the other with a greater force than it collided with.

• The heavier boy will bounce in the opposite direction of the force they collided with and with an equal amount of force.

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Which two statements best describe the forces at work on a person standing on a stool? (choose two)

• The force of gravity is so low on the person they can balance themselves on the beam.

• The force of gravity acting on the person is equal to the normal force applied by the stool.

• The normal force applied by the stool on the person is greater than the force of gravity.

• Gravity applies a downward force on the person and the stool applies an opposite upward force back.

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What is the direction of the force of gravity?

• Upward

• Downward

• Sideways

• Diagonal

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Why does a book not fall off a table?

• The force of gravity is weaker than the normal force exerted by the table.

• The normal force from the table is equal and opposite to gravity's force.

• The book is lighter than the table and floats.

• The direction of gravity is sideways.

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What will happen when the ball is released?

• The ball will hit the others and stop.

• The ball will transfer its momentum, exerting equal and opposite forces on each ball.

• The ball will bounce off the next one while the others stay still.

• The ball will cause the others to start to sway.

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When a compressed spring is released and pushes two objects in opposite directions, what evidence shows energy is being transferred? (Select 2 answers)

• Both objects change speed.

• The spring stays compressed.

• The objects move away from the spring in opposite directions.

• The force is only on the smaller object.

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An ice-skater pushes off a wall and rolls backward. What forces are involved in this interaction? (Select 2 answers)

• The skater pushes the wall.

• The wall pushes back on the skater.

• The skater is pushing at the ground.

• The skater feels force because they’re moving.

• The wall causes friction and pushes the skater.

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Why a trampoline move when someone jumps on it?

• The trampoline has less mass than the person.

• The person applies an action force downward and the trampoline applies a equal reaction force upward.

• The trampoline pushes on the person only.

• The trampoline has no friction.

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When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

• The cannon moving forward

• The cannon moving backwards

• The cannonball moving backwards

• The cannonball moving forward

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A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, same direction

• 200 Newtons, opposite direction

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