Work , Power, Simple Machines Test Review

Front

What is the formula for calculating Power?

Back

Power (P) = Work (W) / Time (t)

Front

What is the unit of Power?

Back

Watt (W)

Front

What is the unit of Work?

Back

Joule (J)

Front

What is a wedge? Give an example.

Back

A wedge is a simple machine that is used to separate two objects. Example: butter knife.

Front

What is the relationship between Work, Power, and Time?

Back

Work is the product of Power and Time: W = P × t.

Front

If a force is applied but there is no movement, is work done?

Back

No, work is not done if there is no movement.

Front

What is the formula for Work?

Back

Work (W) = Force (F) × Distance (d) × cos(θ) where θ is the angle between the force and the direction of motion.

Front

What is an example of a simple machine?

Back

Examples include levers, pulleys, inclined planes, wedges, screws, and wheel and axle.

Front

How do you calculate the time taken if Power and Work are known?

Back

Time (t) = Work (W) / Power (P)