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Triad
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Homework Statement
A cyclist intends to cycle up a 8.00 hill whose vertical height is 115 . The pedals turn in a circle of diameter 36.0 .
1:Assuming the mass of bicycle plus person is 80.0 , calculate how much work must be done against gravity.
2: If each complete revolution of the pedals moves the bike 5.90 along its path, calculate the average force that must be exerted on the pedals tangent to their circular path. Neglect work done by friction and other losses.
Homework Equations
1: W = F*d
2: I don't know. Somehow I am sure it involves 1/2mv^2 + mgy
The Attempt at a Solution
1: W= (80kg*9.8m/s)*115m = 90160 N*m = 9.02*10^4 J (this one I solved)
2: shrug