1) At the construction site, a piling machine is used to drive piles into the ground to serve as support for the buildings. The weight gains gravitational potential energy as it is raised above the ground. When released, its potential energy is converted to kinetic energy. It then hits the piles and drives it into the ground. Which of the following can increase the kinetic energy of the weight that helps to drive the pile into the ground? it a) Increasing the mass of the weight b) Decreasing the mass of the weight c) Lowering the height of the weight d) Putting the weight nearer to the pile 2) The picture shows an electric hand drill. Which of the statements is correct? a) The electric hand drill converts electrical energy into kinetic energy, sound energy and heat energy. b) The electrical hand drill produces electrical energy. c) The electrical hand drill converts potential energy into kinetic energy. d) When the electric hand drill is being used, its gravitational potential energy increases. 3) Two objects of different mass were dropped from the same height. Which of the statements is correct? a) As the objects fall downwards, kinetic energy is converted into gravitational energy. b) At the same height, both the objects have the same amount of gravitational potential energy. c) At the same height, the lighter object has more gravitational potential energy. d) At the same height, the heavier object has a greater amount of gravitational potential energy. 4) When a ball is thrown upwards, it gains _______________ energy. a) sound b) potential  c) kinetic d) heat 5) A ball is dropped from a height. It hits the ground and bounces up again. The height that the ball reaches after each rebound becomes lower and lower, as shown in the diagram. The ball stopped after a few bounces. Why does the height decrease after each rebound? a) The ball was gaining more energy. b) Some of the energy was converted to heat and sound energy. c) Kinetic energy was converted potential energy. d) The ball stopped moving because it has no more potential energy. 6) The diagram shows a catapult. John places a stone in the holder of the catapult and pulls the elastic band. When he releases the elastic band, the stone is able to hit an object 5m away. What should he do in order to hit an object 8m away? a) He should hold the catapult higher. b) He should use a heavier stone c) He should stretch the elastic band of the catapult further. d) He should not stretch the elastic band too much. 7) Two objects were dropped from the same height. Paul sustained more serious head injuries when he was hit by the heavier object. What is the reason? a) The heavier object has more elastic potential energy. b) The heavier object has more heat energy. c) The heavier object has more sound energy. d) The heavier object has more kinetic energy. 8) When the swing moves from the highest point, potential energy is converted to ___________ energy. a) heat b) light c) sound d) kinetic 9) At which position does the pendulum have the greatest amount of kinetic energy? a) Lowest point b) Highest point c) On the right d) On the left 10) When a marble is rolled down a ramp, it moved from its starting position at A, to B, to C and to D. Position D is always lower than A. Why is this so? a) Some energy has been converted to heat and sound energy. b) Some energy has been converted to potential energy. c) Some energy has been converted to kinetic energy. d) Some energy has been converted to light and heat energy. 11) A ball is rolling down a ramp. At its starting (highest) position, the ball has the greatest amount of __________ energy. a) potential b) kinetic c) sound d) heat 12) As the children bounce on the trampoline, elastic potential energy is converted to __________ and __________ energy. a) kinetic; heat b) gravitational potential; kinetic c) gravitational potential; sound d) sound; heat 13) As the mountain climber climbs higher up a mountain, he is gaining ____________ energy a) heat b) (gravitational) potential energy c) light d) kinetic energy 14) The two cars have the same mass. The car moving at a faster speed has more __________ energy. a) potential b) heat c) elctrical d) kinetic 15) At the hydroelectric power station, (gravitational) potential energy is converted to _________ energy at the turbine. a) kinetic b) sound c) heat d) light 16) At the top of the waterfall, the water has the greatest ______________ energy. a) elastic potential b) chemical potential c) gravitational potential d) kinetic 17) Which of the following is NOT an example of (chemical) potential energy a) battery b) food c) petrol d) moving water 18) Which of the following is NOT a form of potential energy? a) Chemical potential energy b) Elastic potential energy c) Gravitational potential energy d) kinetic energy 19) Fossil fuels such as coals, natural gas and oil store _________________ energy. a) chemical potential energy b) gravitational potential energy c) elastic potential energy d) kinetic 20) A wind turbine makes use of the ____________ energy of the wind to produce electrical energy. a) potential b) sound c) heat d) kinetic

Forms and Uses of Energy

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