Exampro a-level Physics (7407/7408)
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3.4.1.8-Conservation-of-energy
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(Total 6 marks)
Q11.A cyclist rides along a road up an incline at a steady speed of 9.0 m s–1 . The mass of the rider and bicycle is 70 kg and the bicycle travels 15 m along the road for every 1.0 m gained in height. Neglect energy loss due to frictional forces. (a) (i) Calculate the component of the weight of the bicycle and the rider that acts along the incline. ............................................................................................................... ............................................................................................................... ............................................................................................................... ............................................................................................................... (ii) Calculate the power developed by the cyclist in riding up the slope. ............................................................................................................... ............................................................................................................... ............................................................................................................... ............................................................................................................... (4) (b) The cyclist stops pedalling and the bicycle freewheels up the incline for a short time. (i) State the energy change taking place as the bicycle freewheels up the slope. ............................................................................................................... ............................................................................................................... (ii) Calculate the distance travelled along the slope from when the cyclist stops pedalling to where the bicycle comes to rest. ............................................................................................................... ............................................................................................................... ............................................................................................................... ............................................................................................................... Download 0.7 Mb. Do'stlaringiz bilan baham: 
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