Newton's Law Quiz Week 3

All objects with mass have momentum.

• True
• False

Choose the equation for calculating momentum from mass and velocity.

• momentum = velocity / mass
• momentum = mass / velocity
• momentum = mass x velocity
• momentum = mass - velocity

Forces act in pairs.

• True
• False

Newton’s Third Law refers to the same type of force acting on different objects.

• True
• False

Action and reaction forces ______ each other out.

• cancel
• do not cancel

What does Newton's Third Law state?

• The Law of Inertia
• Every action has an equal and opposite reaction.
• Acceleration of an object is equal to its net force divided by its mass.
• A body in motion tends to stay in motion and a body in rest tends to stay in rest unless an unbalanced force acts upon it.

When a baseball bat exerts a forward force on a baseball, the equal and opposite force on the ball causes the bat to move ________.

• forward
• upward
• backward
• downward

Which of the following best describes the force causing a rocket to lift off?

• reaction force
• magnetic force
• balanced force
• gravitational force

According to Newton's Third Law, which of the following correctly completed the statement below? The reaction to an action is always _______.

• equal in strength and in the same direction.
• equal in strength and in the opposite direction.
• stronger in strength and in the opposite direction.
• weaker in strength and in the opposite direction.

If a 60 kg roller skater pushes a 30 kg roller skater with a force of 5 N rightward as illustrated in the diagram below, then what will the magnitude and direction of the force exerted by the 30 kg roller skater on the 60 kg roller skater be?

• 0 N
• 5 N leftward
• 5 N rightward
• 10 N leftward