energy equations

Question 1

what is the equation for kinetic energy?

Answer 1

1/2 X mass X speed*2

Question 2

what is the equation for GPE (gravitational potential energy)

Answer 2

mass X gravitational field strength X hight

Question 3

what is the equation for power?

Answer 3

work done/time take = energy transferred/ time taken

Question 4

what is the equation for efficiency? X1

Answer 4

useful energy output/ total energy input

Question 5

what is the equation for efficiency? X2

Answer 5

useful power output/ total power input