| Front | Describe the energy transfer taking place when a car's brakes stop a car? |
| Back | The frictional force of the car's brakes transfers energy from the kinetic energy store to the thermal energy store of the brakes and the surroundings. Calculate using Ek = 0.5 x m x v2 of car before and Ek = 0 when its stopped. |
| Tags |
| Front | If you didn't know the energy inputs and outputs of a device, how else might you calculate efficiency? |
| Back | Useful power output ÷ total power input |
| Tags |
| Front | Describe how you would calculate the energy transfer as a ball goes up in the air and stops. |
| Back | A ball slows down, as it rises in the air, as energy transfers from kinetic energy store to gravitational potential energy store (calculate using Ek at start = Ep at end; Ep = mgh) |
| Tags |