Conservation of Energy

Question 1

What is the equation for efficiency?

Answer 1

efficiency = (useful energy transferred by device) / (total energy supplied to the device)

Question 2

What is the equation for gravitational potential energy?

Answer 2

GPE(J) = mass(kg) x gravitational field strength(N/kg) x change in vertical height(m)

Question 3

What is the equation for kinetic energy?

Answer 3

kinetic energy (J) = 1/2 x mass(kg) x (speed)squared ((m/s)squared)