- #1
SelenaT
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Homework Statement
**Rollercoaster is being built and the values are the specifications[/B]
Determine the power needed to raise the cars to the top of the hill and have them traveling at the wanted speed.
Height of hill: 65m
Speed at top of hill: 2.5m/s
Time to raise cars: 40 seconds
Total mass of cars: 1250kg
State all assumptions.
Homework Equations
P = mgh/t
Eg = mgh
Ek = 1/2mv^2
The Attempt at a Solution
P = mgh / t
= 1250(9.8)(65) / 40
= 19906.3W
Assuming constant speed and no friction.
I don't know how to finish the question.
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