What is the principle of Conservation of Energy?

A ride is fired into the sky by rubber bands of a catapult. Explain the changes to the energy stores as the ride moves upwards.

Work done, (J) =

(Work is done on the object by the force)

Calculate the work done when a force of 20N makes an object move 4.8m in the direction of force.

Change in G.P.E (J) =

Kinetic Energy (J) =

elastic potential energy (J) =

A car moving at a constant speed has 360,000J in its kinetic energy store.
When brakes are applied, it stops in 100m.
Calculate the force that stops the car.

Calculate the kinetic energy stored in a vehicle of mass 500kg moving at a speed of 12m/s.

Wasted energy =

Efficiency =

Examples of improving Efficiency:

Power (W) =

power wasted =