Flashcard 3/21 - Motion & Newton's Three Laws

Front

What is the primary difference between velocity and speed?

Back

Velocity includes direction, speed does not.

Front

What effect does friction have on a moving object?

Back

Friction slows it down.

Front

What principle explains why a rocket moves upward when it expels gas downward?

Back

Newton's Third Law.

Front

What are the two main types of mechanical energy involved in swinging?

Back

Potential and kinetic energy.

Front

What effect does air resistance have on falling objects?

Back

It slows them down.

Front

Define speed in physics.

Back

Speed is the distance traveled per unit of time without regard to direction.

Front

Define velocity in physics.

Back

Velocity is the speed of an object in a specific direction.

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 Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.