Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Energy Resources and Energy Transfers
175 practice questions
Topics covered
Practice questions
91–100 of 175
Question 91
5 marks · Normal
Answer and see the solution →A 400 kg rollercoaster car starts from rest at the top of a track 15 m above the ground. The car descends to the lowest point with negligible friction. Use g = 10 N/kg.
(a)[2 marks]Calculate the gravitational potential energy of the car at the top of the track.
(b)[3 marks]Calculate the speed of the car at the lowest point, assuming all the potential energy changes to kinetic energy.
Question 92
6 marks · Normal
Answer and see the solution →A student with weight 500 N runs up a set of stairs 4 m high in 10 s.
(a)[2 marks]Calculate the work done against gravity as the student climbs the stairs.
(b)[2 marks]Calculate the student's power output while running up the stairs.
(c)[2 marks]Describe one reason why the actual useful power output of the student might be less than the calculated value.
Question 93
1 mark · Easy
Answer and see the solution →State one reason why coal is described as a non-renewable energy resource.
Question 94
1 mark · Easy
Answer and check →Which of the following is considered a renewable energy resource?
- A.Wind
- B.Oil
- C.Coal
- D.Natural gas
Question 95
1 mark · Easy
Answer and see the solution →State one environmental problem caused by burning fossil fuels to produce electricity.
Question 96
1 mark · Easy
Answer and see the solution →State the main reason why nuclear energy is classified as non-renewable.
Question 97
3 marks · Easy
Answer and see the solution →A hydroelectric power station is a renewable energy resource.
(a)[1 mark]State the main energy store in water held in the reservoir before it flows down.
(b)[1 mark]Explain why hydroelectric power is described as renewable.
(c)[1 mark]State one disadvantage of using hydroelectric power stations.
Question 98
1 mark · Easy
Answer and see the solution →State one energy transfer that takes place in a solar panel used to generate electricity.
Question 99
2 marks · Easy
Answer and see the solution →A wind turbine is used to generate electricity.
(a)[1 mark]Name the initial energy store involved in this process.
(b)[1 mark]State one advantage of using wind turbines to generate electricity.
Question 100
2 marks · Easy
Answer and see the solution →Natural gas and coal are both used as fuels in power stations.
(a)[1 mark]State which one releases less carbon dioxide per unit energy produced.
(b)[1 mark]Explain why this is considered an advantage.