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It takes a force of 1250N to keep a car moving with constant speed up a slope?
It takes a force of 1250N to keep a car moving with constant speed up a slope. If the engine delivers 50.0hp (3.73x104 W) what is the speed of the car?
2 Answers
- KnrLv 41 year ago
for the car moving at constant speed
PowerP = force F x speed V
so that V = P / F = 3.73x10’4 / 1250 = 29.84m/ sec.
- oldschoolLv 71 year ago
Power = joules/sec = newton meters/second = Force*speed or velocity. FV = Power so V = Power/F = 37300/1250 = 29.84m/s
29.84m/s *1km/1000m * 3600s/hr = 107km/hr
or about 67miles/hour
