Foundation Equations Flashcards
1
Q
Power = ? X ?
P = ? X ?
Units?
A
Power = voltage x current P = V x I W = V x A
2
Q
Voltage = ? X ? V = ? X ?
A
Voltage = current x resistance V = I x R Volts = ahmps x ohms
3
Q
Total cost = ? X ?
A
Total cost = number of units x cost per unit
4
Q
Efficiency (%) = (? Divided by ?) x 100
A
Efficiency (%) = (useful energy out divided by total energy in) x 100
5
Q
Gravitational Potential Energy = ? X ? X ?
GPE = ? X ? X ?
Units?
A
Gravitational Potential Energy = mass x gravity x height.
GPE = M x G x H
Joules = Kilograms x Newtons x Metres
6
Q
Kinetic Energy = ? x ? x ?
KE = ?
Units?
A
Kinetic Energy = 0.5 x mass x velocity
KE = 1/2mv
Joules = 0.5 x Kilograms x Metres
7
Q
Work done = ? x ?
W = ? X ?
Units?
A
Work done = Force x Distance
W = F x D
W = Newtons x Metres
