- #1
NasuSama
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Homework Statement
A highway goes up a hill, rising at a constant rate of 1.00 m for every 40 m along the road. A truck climbs this hill at constant speed v_up = 18 m/s, against a resisting force (friction) f equal to 1/20 of the weight of the truck. Now the truck comes down the same hill, using the same power as it did going up. Find v_down, the constant speed with which the truck comes down the hill.
ASSUME: the resisting force (friction) has the same magnitude going up as going down.
Homework Equations
Hm...
→W = mgd
→KE = W = ½ * mv²
The Attempt at a Solution
Tried to use this form:
½ * m * v_up² - ½ * m * v_down²
BUT doesn't seem to find the correct path.