Newton's First Law

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.

Front

What does inertia refer to?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

True or False: A hockey puck will eventually slow down on a frictionless surface due to its inertia.

Back

False. It will continue to move at a constant speed in a straight line.

Front

Fill in the blank: An object in motion tends to stay in motion unless an __________ force acts on it.

Back

unbalanced

Front

What does the law of inertia apply to?

Back

It applies to both moving and nonmoving objects.

Front

Fill in the blank: Objects tend to stay at rest unless acted upon by ______.

Back

An outside force.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object.

Front

In which direction does friction act in relation to movement?

Back

Friction acts in the opposite direction of movement.

Front

What happens to a moving object when no unbalanced forces act on it?

Back

It continues to move at a constant velocity.

Front

What is an example of an unbalanced force?

Back

A push or pull that causes an object to accelerate, such as a person pushing a stationary car.