Energy trilogy - AQA

What happens to the amount of energy in a cars kinetic energy store when the car slows down?

• It remains the same

• It decreases as some energy is transferred away to different energy stores

• It decreases as some energy is destroyed

Pick a suitable option that can be used to improve the efficiency of a battery powered toy car

• Insulate the car

• Increase the import energy to the car

• Lubricate any moving parts in the car

When an object falls from a height, the maximum energy transferred to its kinetic energy store is equal to…

• The energy transferred away from its gravitational potential energy store

• The energy transferred to its gravitational potential energy store

Which of these is a disadvantage of using wind turbines to generate electricity?

• They can be noisy

• They release atmospheric pollution when running

• They produce dangerous waste that is difficult to dispose of

The amount of energy transferred by an appliance depends on…

• It’s power and size

• It’s power and mass

• Its power and the time it is on for

800 J of energy is supplied to a toaster with an efficiency of 25%, what is the useful output of the toaster?

• 200J

• 775J

• 1000J

When a racket hits a ball, energy is transferred from the rackets kinetic energy store to their balls kinetic energy store. This energy is transferred…

• By heating

• Electrically

• Mechanically

Two garages of equal size and shape have walls made of the same material. One garage has thicker walls than the other. They are heated to the same temperature then left to cool. Which garage would cool the fastest?

• The one with the thick walls

• The one with the thin walls

Power is the...

• Conservation of momentum

• Energy of a moving object

• Rate of doing work

When a spring is compressed, which of these energy stars is energy transferred to?

• The springs elastic potential energy store

• The springs nuclear energy store

• The springs magnetic energy star