physics : energy formulas

Question 1

kinetic energy = ????

Answer 1

kinetic energy =1/2 × mass × speed2

Question 2

gravitational potential energy (GPE) = ???

Answer 2

GPE = mass × gravitational field strength × height

Question 3

power = ???

Answer 3

power= work done/time taken =energy transferred/time taken

Question 4

what are the two efficiency formulas?

Answer 4

efficiency = useful energy output / total energy input

efficiency= useful power output/total power input