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

What happens to a sliding object when no external force acts on it?

Back

It continues to slide indefinitely at a constant speed in a straight line.

Front

What is required to change the motion of an object?

Back

A force is required to change the motion of an object.

Front

What does friction do to a moving object?

Back

Friction slows down a moving object.

Front

Which object has more inertia: a bus or a soccer ball?

Back

A bus has more inertia because it has more mass.

Front

What is velocity?

Back

Velocity is speed in a specific direction.

Front

What is the relationship between mass and force?

Back

The greater the mass of an object, the more force is needed to change its motion.

Front

What is an example of an external force?

Back

Friction, gravity, or a push/pull from another object.

Front

How does gravity affect motion?

Back

Gravity pulls objects toward the Earth, affecting their motion.