Energy can be described as being in different ‘stores’. It cannot be created or destroyed but it can be transferred, dissipated or stored in different ways.
What is the name of the energy stored by a moving object?
Elastic potential energy
Gravitational potential energy
Where might elastic potential energy be stored?
In a stretched catapult
In a catapult stored in a cupboard
In a candle
What is the main energy transfer for an apple falling from a tree?
Kinetic energy → elastic potential energy
Chemical energy → gravitational potential energy
Gravitational potential energy → kinetic energy
What is the main energy transfer for a long-distance runner?
Kinetic energy → chemical energy
Chemical energy → kinetic energy
Which of these cannot happen to energy?
Energy cannot be stored
Energy cannot be dissipated
Energy cannot be created
If 4,000 J of energy is transferred and 2,500 J is usefully stored, how much energy is wasted?
What happens to 'dissipated' energy?
It is transferred to useful stores
It disappears from the system
It spreads out into the surroundings
What is the gravitational potential energy stored in a 60 kg child sitting at the top of a 2 m high slide? (g = 10 N/kg)
The spring constant of a spring is 25 N/m. The spring is extended by 50 cm. How much elastic potential energy is stored?
A 4 kg ball has 50 J of kinetic energy. How fast is it moving? - Higher