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99 Percentile Qs Bank for JEE MainPhysicsMotion in One Dimension

A vehicle without passengers is moving on a frictionless horizontal road with velocity ' u ' can be stopped in a distance ' d '. Now 40 % of it's weight is added. If the retardation remains same the stopping distance at velocity ' u ' is

Options

  1. A(1.6)d
  2. B(1.4)d
  3. Cd
  4. D(1.2)d

Correct answer

B. (1.4)d

Step-by-step solution

Given, m ₁= m and m ₂=1.4 ~m v ^2= u ^2+2 aS 0= u ^2-2 ad a = u ^2 2 ~d Retarding force f = ma = mu ^2 2 ~d d ^ d =1.4 or d ^ =1.4 ~d

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