# Physics - Energy Key Words

HideShow resource information
Kinetic Energy
The energy of a moving object
1 of 14
Kinetic Calculation
Ek = 1/2 x m x v2
2 of 14
Chemical Energy
The energy stored in fuel (including food). This energy is released when chemical reactions take place
3 of 14
Gravitational Potential Energy (GPE)
The energy of an object due to its position
4 of 14
Gravitational Potential Energy Calculation
Ep = m x g x h --> Ep = change in GPE (Joules, J); m = mass (kilograms, kg); g = gravitational field strength (Newtons per kilogram, N/kg); h = change in height (Metres, m)
5 of 14
Elastic Potential Energy (EPE)
The energy stored in a springy object when we stretch or squash it
6 of 14
Electrical Energy
The energy transferred by an electric current
7 of 14
Work Done Calculation
W = F x d--> W = work done (Joules, J); F = force (Newtons, N); d = distance (Metres, m)
8 of 14
Power
The rate of transfer of energy
9 of 14
Power Calculation
P = E ÷ t --> P = Power (Watts, W); E = energy transferred (Joules, J); t = time taken (seconds, s)
10 of 14
Momentum
The force and speed of an object
11 of 14
Momentum Calculation
p = m x v --> p = momentum (kilogram metres per second, kg m/s); m = mass (kilorgams, kg); v = velocity (metres per second, m/s)
12 of 14
The Law of Conservation of Momentum
Whenever objects interact, the total momentum before the interaction is equal to the total momentum afterwards - provided that no external forces act on them ∴ the total change of momentum is zero
13 of 14
Conservation of Energy
Energy cannot be created or destroyed
14 of 14

## Other cards in this set

### Card 2

#### Front

Ek = 1/2 x m x v2

#### Back

Kinetic Calculation

### Card 3

#### Front

The energy stored in fuel (including food). This energy is released when chemical reactions take place

### Card 4

#### Front

The energy of an object due to its position

### Card 5

#### Front

Ep = m x g x h --> Ep = change in GPE (Joules, J); m = mass (kilograms, kg); g = gravitational field strength (Newtons per kilogram, N/kg); h = change in height (Metres, m)