Force, work, and motion

Front

What is force?

Back

A push or pull on an object that can cause it to change its motion.

Front

What is work in physics?

Back

Work is done when a force is exerted on an object causing the object to move.

Front

What is motion?

Back

Motion is the change in position of an object over time.

Front

What is average speed?

Back

Average speed is the total distance traveled divided by the total time taken.

Front

What is Newton's 1st Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.

Front

What is Newton's 2nd 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 3rd Law of Motion?

Back

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

Front

What is friction?

Back

Friction is a force that opposes the motion of an object.

Front

What is a pulley?

Back

A pulley is a simple machine that uses a wheel and a rope to lift or lower objects.

Front

How can you increase the efficiency of a pulley?

Back

By applying oil to the wheels to help them spin better.