Equations: Energy P1, P2 & P3

Question 1

What is the equation for kinetic energy?

Answer 1

Kinetic energy = 1/2 x mass x speed ^2
Ek = 1/2 mv^2

Question 2

What is the equation for GPE (gravitational potential energy)?

Answer 2

GPE = mass x gravitational field strength x height
Ep = mgh

Question 4

What is the equation for Power?

Answer 4

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

Question 5

What are the two equations for efficiency?

Answer 5

Efficiency = useful energy output / total energy input
Efficiency = useful power output / total power input