Newton's Laws

Fill in the blank: Inertia is the tendency for an object to resist a change in its state of ________.

• motion

• rest

• energy

• temperature

Explain how the law of inertia applies to a soccer ball when kicked.

• The ball will not move until a force is applied.

• The ball will continue to move in a straight line unless acted upon by another force.

• The ball will stop immediately after being kicked.

• The ball will change direction on its own.

Explain why it is harder to move or change the motion of an object with greater inertia.

• Because greater inertia means more mass, requiring more force to change motion.

• Because greater inertia means less mass, requiring less force to change motion.

• Because greater inertia means more speed, requiring more force to change motion.

• Because greater inertia means less speed, requiring less force to change motion.

A golf ball will continue to move at a constant velocity unless a force acts on it to slow it down. Fill in the blank: This is an example of Newton's ______ Law of Motion.

• First

• Second

• Third

• Fourth

An object at rest, will remain at rest unless:

• Both forces cancel each other out

• Acted on by an external force

• It changes its mass

• It produces more force.

What does Newton's second law of motion state?

• It states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an external force.

• It states that the force acting on an object is equal to the mass of that object times its acceleration.

• It states that for every action, there is an equal and opposite reaction.

• It states that energy cannot be created or destroyed, only transformed.

Fill in the blank: The equation for force is Force = mass x ________.

• acceleration

• velocity

• distance

• time

According to Newton's second law, what happens to an object's acceleration if the force applied to it increases?

• A) It decreases

• B) It remains the same

• C) It increases

• D) It stops

According to Newton's third law, what happens when swimmers apply a force to the starting blocks?

• The blocks move forward.

• The blocks apply an equal and opposite force on the feet of the swimmers.

• The swimmers stop moving.

Fill in the blank: If the same force is applied to different bodies, the ______ one will have greater acceleration.

• lighter

• heavier

• larger

• smaller