4 Energy transfers Flashcards
(11 cards)
What is the principle of conservation of energy?
Energy is not created or destroyed in any process
How do you calculate the efficiency of something?
useful energy/total energy x100
What is the work done formula
Work = Force (N) x distance (m)
What is the formula for GPE?
GPE = m (kg) x g x h (m)
What is GPE?
The gravitational potential energy
What is the GPE equal to when you rise an object?
GPE = work done
What happens in terms of energy when an object is held above the ground?
GPE = maximum
KE = zero
What happens in terms of energy when an object is falling down?
GPE = decreasing
KE = increasing
What happens in terms of energy when an object is about to hit the ground?
GPE = zero
KE = maximum
What is the kinetic energy formula?
KE (J) = 1/2 x mass (kg) x speed^2
What is the formula for power?
Power (W) = work (J) / time (s)
