Homework Help: physics

Posted by Allison on Thursday, May 5, 2011 at 3:22am.

If 7.00hp are required to drive a 1500-kg automobile at 66.0 km/h on a level road. What power is necessary to drive the car at 66.0 km/h down a 1.00 % grade? It requires 42.9 hp to drive the car at 66.0 km/h up a 10.0 % grade (a hill rising 10.0 m vertically in 100.0 m horizontally). The total retarding force due to friction, air resistance, and so on is 285 N

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