3.1 Energy and work Flashcards
0
Q
What is j (joule) the unit of? (2)
A
Energy and work
1
Q
When is work done on an object?
A
When a force makes the object move.
2
Q
If the distance moved is zero how much work has been done?
A
None
3
Q
What is work done to overcome friction mainly transfered into energy by?
A
Heating
4
Q
What is friction?
A
Force opposing the movement of one surface over another
