Newton's First Law of Motion

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 'net force' mean?

Back

The overall force acting on an object when all the individual forces are combined.

Front

What is an unbalanced force?

Back

A force that causes an object to change its motion; it is not equal in size and opposite in direction to other forces acting on the object.

Front

What is a balanced force?

Back

Forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

If two elephants are pulling on a rope with equal force in opposite directions, what is the net force?

Back

0 N (zero net force) because the forces cancel each other out.

Front

What happens to an object in motion if no unbalanced force acts on it?

Back

It continues to move at a constant velocity.

Front

What is an example of an object at rest?

Back

A book lying on a table.

Front

What is an example of an object in motion?

Back

A car driving down the street.

Front

How can you tell if forces are balanced?

Back

If the net force is zero, the forces are balanced.

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.