Question

The speed of driving a car safely in darkness depends upon the range of headlight. Explain

Answer 1

It is because if car's headlight has high range, then driver can able to see the road and side boundaries up to greater extent and he can attain high speed in that case............But if car's headlight has low range, then driver can able to see up to very small extent so he would drive slow for safety........

Answer 2

Answer:

By the range of the headlights of a car, we mean the maximum distance up to which an obstacle on the road can be seen by the driver in the darkness. The driver has to stop the car before it reaches the obstacle. The retarding force acting on the car is constant. If, on applying brakes , the retardation of car is 'a' ,then to stop the car within distance 's' , the speed 'v' of the car should be less than $\sqrt{2a \: s}$

Thus the speed of the car depends on range of the headlight.