Physics WPE Flashcards
1
Q
Conservative Force
A
Dosen’t interfere with energy of a system
2
Q
Non conservative force
A
Takes away or adds to the energy of a system
3
Q
What are the only two conservative forces
A
Gravity and Spring
4
Q
Unit for work
A
Joules
5
Q
Unit for power
A
Watts
6
Q
Who does more work when climbing stairs?
A
Everyone does the same amount of work if the stairs are the same height
7
Q
Who has more power when climbing up stairs?
A
The person with more mass and in less time
8
Q
If a force increases KE, it does______ work
A
Positive
9
Q
If a force decreases KE, it does ______ work
A
Negative
10
Q
Work formula
A
Force x displacement
10
Q
Work energy theorem
A
PE + KE + W = PEf + KEf
11
Q
PE formula
A
Mass x height x gravity
12
Q
KE formula
A
1/2 x mass x Velocity squared
13
Q
Is work scalar or vector
A
Scalar
14
Q
Is power scalar or vector
A
Scalar
