Energy Equations Flashcards
1
Q
What is the equation for work done
A
Force x distance
2
Q
What are the units for work done
A
Joules, J
3
Q
What are the units for energy
A
Joules, J
4
Q
What is the equation for conservation of energy
A
Input energy = useful output energy + energy wasted
5
Q
What is the equation for efficiency
A
Useful energy
——————- x100
Total energy
6
Q
What is the unit for efficiency
A
Efficiency does not have a unit
7
Q
What is the equation for power
A
Power= energy transferred
—————————
Time taken
8
Q
What are the units for power
A
Watts, W
9
Q
What is one watt equal to
A
1 joule of energy
10
Q
What does 1kW equal
A
1000 W
11
Q
What is the equation for gravitational potential energy
A
Mass x gravitational field strength x height
12
Q
What is the equation for kinetic energy
A
0.5 x mass x velocity ^2
