Unit 4 Review

Front

What pulls a ball back to earth?

Back

Gravity is the force that pulls objects toward the center of the Earth.

Front

A _______ is a push or pull.

Back

Force is defined as a push or pull acting on an object.

Front

Which force produces a change in motion?

Back

An unbalanced force causes a change in the motion of an object.

Front

Which has more inertia-- Truck, Cat, Ant, Skateboard?

Back

A truck has more inertia because it has more mass than the other objects.

Front

45 meters per second squared is the--

Back

Acceleration is the rate of change of velocity, measured in meters per second squared.

Front

What is inertia?

Back

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

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is balanced force?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Front

What is an example of friction?

Back

Friction is the force that opposes motion between two surfaces in contact, like rubbing your hands together.

Front

What is mass?

Back

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