The mass of an electric car is 900 kg including the passengers. A single motor m

Question

The mass of an electric car is 900 kg including the passengers. A single motor mounted on the front wheels drives the car, and the radius of the wheel is 0.3 m. The car is going downhill at a speed of 50 km/hr, and the slope of the hill is 30 degree. The friction coefficient of the road surface at a given weather condition is 0.5. Ignore the motor losses and compute the power generated by the electric machine. Assume that the electric car in Problem 4.1 is moving at a constant speed. It takes the car 1 min to reach the bottom of the hill. Calculate the energy generated by the electric machine.

Explanation / Answer

draw the FBD and balance the forces u will get the answer

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