IGCSE Physics - Section 4 Energy practice exam questions.
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1 IGCSE Physics - Section 4 Energy practice exam questions. Question 1. 5 The diagram shows a chimney over a furnace. A coal fire is burning in the furnace. Air moves into the furnace and up the chimney. chimney air in furnace coal fire Describe how the process of convection causes this air movement. (5) (Total for Question 5 = 5 marks)
2 Question 2. 7 In 2013, the UK Government decided to build another nuclear power station at Hinckley Point. Hinckley Point is in Somerset, a major agricultural area of the UK. This will be the third nuclear power station at the site. guardian Discuss the advantages and disadvantages of nuclear power stations and biomass power stations. (6). (Total for Question 7 = 6 marks) TOTAL FOR PAPER = 60 MARKS
3 Question 3. 8 (a) A student investigates the energy transfers in a small generator. She connects the generator to a circuit that includes a lamp. She hangs a mass from a string wound around the axle. The lamp lights as the mass falls to the ground. generator axle ruler mass The table shows the student s results. height that mass falls mass time taken for mass to fall average current in the lamp average voltage across the lamp 0.61 m 2.75 kg 1.3 s 0.46 A 12.7 V (i) State the equation linking gravitational potential energy, mass, g and height. (ii) Calculate the gravitational potential energy, GPE, lost by the mass. (2) GPE =... J
4 (iii) Explain why only some of the gravitational potential energy of the mass is transferred to the lamp. (2) (iv) Calculate the energy transferred to the lamp. (2) energy transferred =... J (b) Water from a reservoir can be used to generate electricity on a large scale. Describe the energy transfers involved in this process. (3) (Total for Question 8 = 10 marks)
5 Question A golfer practises hitting balls on a golf course. (a) Ball X rolls along level ground, as shown in the diagram. (i) Add labelled arrows to the diagram to show the directions of two of the forces acting on ball X. (ii) Explain why ball X slows down and stops. (2) (3) (b) The golfer hits ball Y at an angle into the air. He gives it the same initial kinetic energy as ball X. Suggest why ball Y travels much further than ball X before it stops.
6 (c) The mass of ball Y is 45 g. The golfer gives the ball 36 J of kinetic energy when he hits it. (i) State the equation linking kinetic energy, mass and speed. (ii) Calculate the initial speed of ball Y. (4) (iii) Ball Y reaches a maximum height of 30 m. initial speed =... m/s Suggest how the golfer should hit ball Y so it can reach a greater height. (Total for Question 13 = 12 marks)
7 Question 5. 6 A person has a suitcase with wheels. 13 N (a) The person pulls the suitcase with a horizontal force of 13 N for 110 m. (i) State the equation linking work done, force and distance moved. (ii) Calculate the work done on the suitcase by the person. (2) work done =... J (iii) How much energy is transferred to the suitcase? energy transferred =... J 10 *P44251A01016*
8 (b) The suitcase falls over. Explain why it loses gravitational potential energy when it falls. (2) (c) The person starts to raise the suitcase again by pulling on the handle with force F. The weight of the suitcase is 150 N. F pivot 0.87 m 0.32 m 150 N (i) State the equation linking moment, force and perpendicular distance from the pivot. (ii) Calculate the force F that the person must apply on the handle to start raising the suitcase. (3) force F =... N (Total for Question 6 = 10 marks) *P44251A01116* 11
9 Question 6.
10
11 Question 7.
12
13 Question A student investigates how the energies of a ball and spring change when the ball and spring vibrate together. The diagrams and bar charts show how the energies of the ball and spring vary with the position of the ball. The ball has a mass of 1 kg. ball at top energy in J ground level 5 0 GPE KE EPE Total ball in middle energy in J ground level 5 0 GPE KE EPE Total ball at bottom ground level energy in J GPE KE EPE Total GPE = gravitational potential energy of the ball (zero at ground level) KE = kinetic energy of the ball EPE = elastic potential energy of the spring 28 *P44265A02836*
14 Use information from the diagrams and the bar charts to describe what happens to the energy, speed and position of the ball as it vibrates on the spring. (6) (Total for Question 11 = 6 marks) *P44265A02936* 29
15 Question 9. 1 The diagram shows a roller-coaster ride. Answer ALL questions. The car is pulled slowly from the start to point B and then released. B D A C start car E (a) Choose letters from the diagram to complete this sentence. (2) The car has the most gravitational potential energy at point... and it goes fastest at point.... (b) The mass of the car is 900 kg. The maximum speed of the car is 15 m/s. (i) State the relationship between momentum, mass and velocity. (ii) Calculate the maximum momentum of the car. Give the unit. (3) maximum momentum =... unit... 4 *P44266A0420*
16 (iii) State the equation linking kinetic energy (KE), mass and speed. (iv) Calculate the maximum KE of the car. (2) maximum KE =... J (Total for Question 1 = 9 marks) *P44266A0520* 5
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