Work and power (4.11-4.17) Flashcards
1
Q
relationship between work done, force and distance moved
A
work done = force x distance moved
w = f x d
2
Q
relationship between gravitational potential energy, mass, gravitational field strength and height
A
gravitational potential energy = mass x gravitational field strength x height
gpe = m x g x h
3
Q
kinetic energy
A
kinetic energy = 1/2 mass x speed^2
ke = 1/2m x v^2
4
Q
when an object falls
A
gpe is converted into ke
5
Q
an engine causing a car to speed up
A
chemical energy is transferred into kinetic energy
6
Q
a car applying its brakes
A
kinetic energy becomes transferred into thermal energy
7
Q
power
A
power = work done/time taken p = w/t
