Energy - Work Flashcards
1
Q
What is work?
A
A force acting on an object causing a displacement
2
Q
What is the equation for work?
A
W = F * x
3
Q
When is positive work done?
A
When force and displacement are going the same direction.
4
Q
When is negative work done?
A
When force and displacement are going opposite directions.
5
Q
How do you find work from a force vs. displacement graph?
A
Area
6
Q
How are work and energy related?
A
Work changes a system’s energy
7
Q
What is power?
A
Power is the amount of work done in a period of time
8
Q
What is the equation for power?
A
Work / time or force * time
9
Q
What are the units for work?
A
Joules (J)
10
Q
What are the units for power?
A
Watts (W) or Joules / sec (J/s)
