Energy and Newton's First Law of Motion

Front

What is the force of gravity acting on an object called?

Back

Weight

Front

What happens to gravitational force as the distance between two objects increases?

Back

It decreases.

Front

True or False: A hockey puck sliding on a frictionless surface will eventually slow down because of its inertia.

Back

False

Front

Which system has greater gravitational attraction between two objects?

Back

It depends on their masses and distance; System B has greater attraction if it has more mass.

Front

What kind of objects have inertia?

Back

All objects with mass.

Front

Define inertia.

Back

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

Front

What is mass?

Back

Mass is the amount of matter in an object, usually measured in kilograms.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass.

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 a net external force.

Front

Give an example of Newton's First Law of Motion.

Back

A soccer ball will not move until kicked (external force).