equations Flashcards
1
Q
work done
A
work done = force x distance
2
Q
kinetic energy
A
kinetic energy = 0.5 x mass x (speed)2
3
Q
grav potential energy
A
gravitational potential energy = mass x gravitational field strength (g) x height
4
Q
power - energy
A
power = energy transferred / time
5
Q
power - work
A
power = work done / time
6
Q
efficiency - energy
A
efficiency = useful output energy transfer / total input energy transfer
7
Q
efficiency - power
A
efficiency = useful power output / total power input
8
Q
charge flow
A
charge flow = current x time
9
Q
potential difference
A
potential difference = current x resistance
10
Q
power - electricity
A
power = potential difference x current
11
Q
power - resistance
A
power = (current)2 x resistance
12
Q
energy transferred
A
energy transferred = charge flow x potential difference
