Unit 3 Force and Motion VOCABULARY REVIEW (20 words)

Front

What is friction?

Back

A force that opposes motion between two surfaces that are in contact.

Front

What is rolling friction?

Back

The force that resists one solid rolling on another.

Front

What is gravity?

Back

The force that attracts a body toward the center of the earth, or toward any other physical body having mass.

Front

What is fluid friction?

Back

The resistance to an object’s motion in a fluid.

Front

What is momentum?

Back

The quantity of motion of a moving body, measured as a product of its mass and velocity.

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding over each other.

Front

What is the formula for calculating force?

Back

Force = mass × acceleration (F = ma).

Front

What is inertia?

Back

The tendency of an object to resist changes in its state 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 unless acted upon by a net external force.

Front

What is acceleration?

Back

The rate of change of velocity of an object with respect to time.