January 2nd, 2009 | 
Author: Bike 13kg
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Physics problem work up an incline?
A bicycle rider pushes a bicycle that has a mass of 13kg up a steep hill. The incline is 25 Degrees and the road on the hill is 275 meters long. The rider pushes the bike parallel to the road with a force of 25 N.
a) How much work does the rider do on the bike?
b) How much work is done by the force of gravity on the bike?
I get 6875J for question a) and 14850J for question b) but I have no idea if they are right or not because I don't have the answers lol
The force of standard gravity acting on a 1 kg mass is 9.80665 N. The component of force acting parallel to the road would be (13)(9.8)sin(25degrees) = 54 Newtons. The bike might move the rider, but with 25 N the rider would definitely not move the bike.
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