formulae Flashcards
1
Q
kinetic energy
A
KE = half mass x velocity squared
2
Q
gravitational potential energy
A
GPE = mass x gravity x height
3
Q
force
A
F = mass x acceleration F = ma
4
Q
pressure
A
pressure = force divided by area
5
Q
moment
A
moment = force x perpendicular distance from pivot
6
Q
speed
A
speed = distance over time
7
Q
acceleration
A
acceleration = change in velocity over time taken
8
Q
momentum
A
momentum = mass x velocity
9
Q
weight
A
weight = mass x gravitational field strength
10
Q
density
A
density = mass divided by volume
11
Q
work done
A
work done = force x distance moved
12
Q
efficiency
A
useful energy output divided by total energy input
13
Q
charge
A
charge = current x time Q = It
14
Q
voltage
A
voltage = current x resistance V = IR
15
Q
electrical power
A
power = voltage x current W = IV
