1) What is the name of the energy stored by a moving object a) Elastic potential energy b) Kinetic energy c) Gravitational potential energy 2) Where might elastic potential energy be stored? a) In a stretched catapult b) In a catapult stored in a cupboard c) In a candle 3) What is the main energy transfer for an apple falling from a tree? a) Kinetic energy → elastic potential energy b) Chemical energy → gravitational potential energy c) Gravitational potential energy → kinetic energy 4) What is the main energy transfer for a long-distance runner? a) Kinetic energy → chemical energy b) Chemical energy → gravitational potential energy c) Chemical energy → kinetic energy 5) Which of these cannot happen to energy? a) Energy cannot be stored b) Energy cannot be dissipated c) Energy cannot be created 6) If 4,000 J of energy is transferred and 2,500 J is usefully stored, how much energy is wasted? a) 6,500 J b) 1,500 J c) 3,250 J 7) What happens to 'dissipated' energy? a) It is transferred to useful stores b) It spreads out into the surroundings c) It disappears from the system 8) 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) a) 1,200 J b) 600 J c) 120 J 9) 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) 31,250 J b) 1,250 J c) 3.125 J 10) A 4 kg ball has 50 J of kinetic energy. How fast is it moving? a) 12.5 m/s b) 5 m/s c) 2.5 m/s

Energy KS4

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