sromick
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Homework Statement
1. Assume the mass of the roller coaster is 750 kg. Answer the following.
a) If the height of the first hill is 35 meters (measured from the ground), calculate the potential and kinetic energies at this highest position on the track.
b) When the riders are at the first "dip" in the track, the height is 10 meters (measured from the ground), calculate the potential and kinetic energies at position on the track (assume no loss of energy due to friction).
c) At a hill right before a loop, the riders are 20 meters above the ground. Calculate the potential and kinetic energies at position on the track (assume no loss of energy due to friction).
Homework Equations
KE= (1/2)*m*(v^2)
PE= m*g*h
PEi+KEi=PEf+KEf
The Attempt at a Solution
For A, I used PE=mgh which is (750kg)*(9.8)*(35) = 257250 joules. Also for A, KE is 0 because it is at the top of the hill. Is this correct? And how do I do b and c? I have no clue!
Thanks!