Topic 1: Energy Equations

Question 1

What is the Kinetic Energy equation?

Answer 1

Kinetic energy = 0.5 x mass x speed^2 (speed is squared)
Ek = 0.5 x m x v^2 (velocity is squared)

Question 2

What is the Gravitational potential energy equation?

Answer 2

GPE = mass x gravitational field strength x height
Ed = m x g x h

Question 3

What is the power equation?

Answer 3

Power =work done/time taken = energy transferred/time taken
P = W/t = E/t

Question 4

What is the Efficiency equation?

Answer 4

Efficiency = useful energy output/total energy input
OR

Efficiency = useful power output/total power input

Question 5

What are the two power equations?

Answer 5

Power = energy transferred/time
P = E/t
Power = work done/time
P = W/t