Physics test 2

Chapters 4-6

Newton’s First Law

Inertia

Newton’s Second Law

Force and Acceleration

Newton’s Third Law

Action and Reaction

Static Friction

An object is at rest

Kinetic Friction

An object is in motion

What direction is the elevator going if you weigh less than usual?

It is accelerating downward.

What direction is the elevator going if you weigh more than usual?

It is accelerating upward.

Why would an object be in equilibrium?

It is either at rest or in unchanging motion.

Electromagnetic Force

Attracts and Repels.

Gravitational Force

Gravity

Strong Nuclear Force

The strongest force, works only in small distances

Weak Nuclear Force

Works in even smaller distances, weaker than the strong force but stronger than the gravitational force.

What does “miu” stand for?

coefficient of friction

Mass

Measure of the amount of material in an object.

Weight

Measure of the gravitational force acting on an object, weight depends on an objects location.

Volume

Measure of space