P1 Flashcards
1
Q
Gravitational potential energy =
A
Mass (kg) x Gravitational field strength (N/ Kg) x Height (m) 
2
Q
Elastic potential energy =
A
1/2 x spring constant (N/m) x extension (m) 2
3
Q
Kinetic energy =
A
1/2 x mass (kg) x speed (m/s) 2
4
Q
Work done (j) =
A
Force (N) x distance (m)
5
Q
Power (w) =
A
Energy (j)
Time (s)
6
Q
Efficiency=
A
Useful energy output
Total energy input
7
Q
Conservation of energy =
A
Energy cannot be created or destroyed
8
Q
Energetic can be transferred between
A
Different energy stores in a closed system
9
Q
Work definition
A
Energy transferred by a force
10
Q
Power definition
A
Rate at which energy is transferred
11
Q
What stores of energy are usually wasted energy
A
Sound and thermal
