Work and Energy Flashcards
1
Q
Work done in terms of kinetic energy
A
work done = change in kinetic energy
2
Q
Work done formula
A
magnitude of force x distance moved in direction of force
3
Q
Kinetic Energy
A
12 m v^2
4
Q
Work done by a non-constant force in one dimension
A
If force is F(x) then work done is
integral from a to b of F(x) dx
5
Q
Power
A
= d/dt (work) or
= Force x velocity
6
Q
Average power
A
work done / time taken
7
Q
At what height, h, does a car need to start at in hot wheels to oscillate about the bottom?
A
h
8
Q
At what height, h, does a car need to start at in hot wheels to fall off the track?
A
R
9
Q
At what height, h, does a car need to start at in hot wheels to loop the loop?
A
h > 5/2 R
10
Q
Centripetal force
A
m v^2 / R
or
mrw^2
