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Stopping distance of a moving vehicle is directly proportional toA. square of the initial velocityB. square of the initial accelerationC. the initial velocityD. the initial acceleration |
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Answer» Correct Answer - A Let `d_s` is the distance travelled by the vehicle before it stops. here, final velocity v = 0, initial velocity = u, S = `d_s` Using equation of motion `v^(2) = u^(2) + 2aS` `therefore` `(0)^(2) = u^(2) + 2ad_s`, `d_s = -u^(2)/2a` or `d_s propto u^(2)` |
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