Work

1

Which is a correct example of work being done?

2

What are the correct units for work?

3

How much work is done by a 10 N force pushing a box 4 m across the floor?

4

If a motor does 500 J of work to lift a 200 N weight, how high was the weight lifted?

5

Which of the following is a definition of power?

6

A hair dryer transfers 10,000 J of energy in 4 s. What is its power?

7

A 60 W lamp is left on for 20 s. How much energy has been transferred?

8

What is one watt equal to?

9

The efficiency of a device is a measure of…

10

What is the correct formula for calculating efficiency?