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 at a constant velocity unless acted upon by a net external force.

Front

What is inertia?

Back

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

Front

Why does an 18-wheeler truck have more inertia than a bicycle?

Back

Because it has more mass.

Front

What is a force?

Back

A force is a push or pull that can cause an object to accelerate.

Front

What happens to an object in motion when balanced forces act on it?

Back

The object will continue to move at a constant speed and in the same direction.

Front

What force causes moving objects to come to a stop?

Back

Friction.

Front

How does mass relate to inertia?

Back

Objects with greater mass have greater inertia.

Front

What is the relationship between force and motion?

Back

A net force acting on an object causes it to accelerate in the direction of the force.

Front

What is an example of an unbalanced force?

Back

A soccer player kicking a ball, causing it to accelerate in the direction of the kick.

Front

What is the effect of gravity on an object in free fall?

Back

Gravity causes the object to accelerate downward.