Energy - Work

Question 1

What is work?

Answer 1

A force acting on an object causing a displacement

Question 2

What is the equation for work?

Answer 2

W = F * x

Question 3

When is positive work done?

Answer 3

When force and displacement are going the same direction.

Question 4

When is negative work done?

Answer 4

When force and displacement are going opposite directions.

Question 5

How do you find work from a force vs. displacement graph?

Answer 5

Area

Question 6

How are work and energy related?

Answer 6

Work changes a system’s energy

Question 7

What is power?

Answer 7

Power is the amount of work done in a period of time

Question 8

What is the equation for power?

Answer 8

Work / time or force * time

Question 9

What are the units for work?

Answer 9

Joules (J)

Question 10

What are the units for power?

Answer 10

Watts (W) or Joules / sec (J/s)