Question

There is a wheelchair competition. They put a ramp 4m above ground level and the ramp has an angle of inclination which is 32 degrees.

a) the first person weighs 590 N. Draw a free body diagram showing the three forces acting on the person when he is in motion. Calculate the work that each force does.

b) the second person also weighs 590 N. She does not use the ramp and falls directly to the ground. She was 4m above the ground to begin with. How much work was done on this person and at what velocity did the person crash?

c) the third person has a motor in his wheelchair. The motor adds a force. He takes 1.2 s to go down the ramp. He weighs 580 N and his initial velocity was 0 m/s. What force did the motor exert?

d) What is the horsepower of the wheelchair from part c?

Answer 1

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