Physics - Work and power Flashcards
1
Q
work done (calc)
A
work done (J) = force (N) x distance (m)
2
Q
work done
A
- when an object is moved over a distance by a force applied in the direction of its displacement
- work done (J) = energy transferred (J)
3
Q
no energy gained?
A
when two opposing balanced forces are going against eachother.
4
Q
GPE (calc)
A
GPE = mass (Kg) x gravitational field strength (N/Kg) x height (m)
GPE = m x g x h
5
Q
KE (calc)
A
KE (J) = 1/2m v²
6
Q
velocity (calc)
A
V = √ 2KE/m
7
Q
mass (calc)
A
m = 2KE/V²
8
Q
Kg to N
A
mass x gravity (10)
9
Q
energy?
A
- energy is always conserved
10
Q
power
A
the energy transferred per unit of time
11
Q
power (calc)
A
power (Watts) = energy transferred (J) / time (s)
