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It has been observed that drivers increase the speed of vehicles on approaching a hilly road. Explain the reason why?

Asked by Topperlearning User 4th June 2014, 1:23 PM
Answered by Expert
Answer:

When a vehicle is moving on a flat road, it has to do work to overcome the friction of road and the air resistance but no work is done against force of gravity. On the other hand when the vehicle is moving up the hill, then to move forward in addition to friction and air resistance it has to do work against the force of gravity. Therefore, the drivers increase the speed of vehicles on approaching a hilly road.

Answered by Expert 4th June 2014, 3:23 PM
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