Newton's Third law

Newton's Third law

Multiple Choice

Newton's Third Law States...

• Objects in motion stay in motion and objects at rest stay at rest
• Force is equal to mass times acceleration
• For each action there is an equal and opposite reaction

Multiple Choice

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction force is...

• The grip of the player's hands on the ball
• the air resistance of the ball
• the force of the ball against the bat

Multiple Choice

A player throws a ball. The action force is the player impact on the ball. The reaction force is...

• The force of the ball impact on the player
• The force of the grip of the ball
• The celebration the player is thinking of

Multiple Choice

An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...

• Air resistance against the bow
• the arrow's push against the bowstring
• the grip of the archer's hand on the bow

Multiple Choice

According to Newton's Third Law, if someone is riding a wakeboard and then jumps off, the wakeboard will travel in the opposite direction because...

• the mass of the wakeboard is the same as the person jumping off

• the pull of gravity on the person is sthe same as on the wakeboard

• the air resistance on the person is great and the friction on the wakeboard is small

• for the force that sent the person forward, there is an equal force pushing back on the wakeboard.

Multiple Choice

An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...

• Air resistance against the bow

• the arrow's push against the bowstring

• the grip of the archer's hand on the bow

Multiple Choice

An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

• larger.

• the same.

• smaller

• need more information to say.

Multiple Choice

Acceleration due to gravity, g, is ____ m/sec2.

• 4.9
• 9.8
• 19.6
• 39.2

Multiple Choice

If you push on a wall with a force of 30 N, the force acting on you from the wall is which of the following?

• 0 N

• 10 N

• 20 N

• 30 N

Multiple Choice

When you step on a small pebble, the pebble applies an equal and opposite force on your foot.

• True

• False

Multiple Choice

A person is attracted towards the center of Earth by a 440N gravitational force. The force with which Earth is attracted toward the person is

• More than 440N

• Less than 440N.

• The same, 440N.

Multiple Choice

Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object.

• Always true

• Sometimes true

• Never true

Multiple Choice

By pushing backwards a roller skater moves forward. This is an example of Newton's

• First Law

• Second Law

• Third Law

• Law of Gravity

Multiple Choice

Which law explains how rockets are launched into space?

• Newton's First Law of Motion
• Newton's Second Law of Motion
• Newton's Third Law of Motion
• Newton's Fourth Law of Motion

Multiple Choice

What happens when two objects, such as a baseball and a bat, collide?

• They hit each other with the same force in the same direction.

• They hit each other with the same force in opposite directions.

• They hit each other with unequal force in opposite directions.

• One remains still while the other one moves in the same direction.

Multiple Choice

Which best explains why we are able to accelerate forward when starting to run?

• As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.
• No acceleration takes place. Runners are always at a fixed velocity.
• The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
• The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward

Multiple Choice

How many Laws of Motion are there?

• 1
• 2
• 3
• 4

Multiple Choice

According to Newton's third law forces come in pairs?

• True
• False

Multiple Choice

According to Newton's Third law the strength or magnitude of forces will be...

• smaller
• equal
• larger

Multiple Choice

A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...

• Less than 1, 000 N
• 1,000 N
• More than 1,000 N