5. Work, energy and power
A section of Physics, 9702
Listing 10 of 242 questions
Define acceleration. A man travels on a toboggan down a slope covered with snow from point A to point B and then to point C. The path is illustrated in . horizontal horizontal 20° 40° B A C man toboggan, at rest (not to scale) The slope AB makes an angle of 40° with the horizontal and the slope BC makes an angle of 20° with the horizontal. Friction is not negligible. The man and toboggan have a combined mass of 95 kg. The man starts from rest at A and has constant acceleration between A and B. The man takes 19 s to reach B. His speed is 36 m s–1 at B. Calculate the acceleration from A to B. acceleration = m s–2 Show that the distance moved from A to B is 340 m. For the man and toboggan moving from A to B, calculate 1. the change in kinetic energy, change in kinetic energy = J 2. the change in potential energy. change in potential energy = J Use your answers in to determine the average frictional force that acts on the toboggan between A and B. frictional force = N A parachute opens on the toboggan as it passes point B. There is a constant deceleration of 3.0 m s–2 from B to C. Calculate the frictional force that produces this deceleration between B and C. frictional force = N
9702_s16_qp_22
THEORY
2016
Paper 2, Variant 2
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Questions Discovered
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