Forces and Motion Unit Review

Front

A reference _________ is a place or object used to see if motion has occurred.

Back

point

Front

Acceleration occurs if an object...

Back

speeds up, slows down, or changes direction. (All answers are correct.)

Front

Why do the spheres on the top have more gravitational attraction to each other?

Back

They are closer together.

Front

To calculate the speed of an object, you must divide distance by ____________.

Back

time

Front

The weight of an object is caused by the force of ____________ acting on it.

Back

gravity

Front

What is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time

Front

What is inertia?

Back

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

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that 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

What is the unit of force?

Back

The unit of force is the Newton (N).