Newton's 3rd Law of Motion

Multiple Choice

According to Newton’s Third Law, when you lean on a wall, which force is greater?

• the wall's force

• your force

• the force of friction

• they are equal

Multiple Choice

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backward because -

• the mass of the skateboard is the same as the mass of the person jumping off.

• the pull of gravity on the person is the same as on the skateboard, regardless of size.

• the air resistance on the person is great and the friction on the skateboard is small.

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

Multiple Choice

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

• False

• True

Multiple Choice

A book pushes down on a table with a force of 5N, the table..

• Pushes back with a force of 5N

• Pushes back with a force less than 5N

• Pushes back with a forcec greater than 5N

• Does nothing. A table has no force.

Multiple Choice

Newton's third law states that any action will have a(n) _______ and ______ reaction

• Equal and similar
• Equal and opposite
• Equal and different
• Greater and opposite

Multiple Choice

When a heavy football player and a light football player run into each other, who exerts more force?

• The heavy one

• The light one

• They both exert an equal amount of force

Multiple Choice

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

• The cannon moving forward
• The cannonball moving forward
• The cannon moving backward
• The cannonball moving backward