Chapter 5 - Forces and Energy Flashcards
1
Q
When is work considered to be done?
A
When force makes an object move
2
Q
What does work done overcome?
A
The fricion –> transfered as energy. This heats objects that rub together –> heats surroundings
3
Q
What IS energy transferred equal to?
A
Work done
4
Q
What is power?
A
Rate which energy is transfered
5
Q
If a machine works faster, it is…
A
More powerful
6
Q
When does GPE increase?
A
When an objects height increases
7
Q
Why do objects gain GPE?
A
Work done is overcoming gravity
8
Q
What does KE of a moving object depend on?
A
Mass and speed
9
Q
When is Elastic PE stored in an object?
A
When work is done on an object to change its shape
