Q.

In order to stop a car in shortest distance on a horizontal road, one should:

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a

Apply the brakes very hard so that the wheels stop rotating

b

Apply the brakes hard enough to just prevent slipping

c

Pump the brakes (press and release)

d

Shut the engine off and not apply brakes

answer is C.

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Detailed Solution

When one pumps the brakes (press and release) then speed reduces without slipping of tyres and car stops immediately. 

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