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JEE Main 2002 (AIEEE) · Equations of Kinematics

Equations of Kinematics question from JEE Main 2002 (AIEEE)

Q40JEE Main 2002 · AIEEEEasy

Equations of Kinematics

Speeds of two identical cars are uu and 4u4u at the specific instant. The ratio of the respective distances in which the two cars are stopped from that instant is:

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Answer: (d)

  1. Identical cars have the same braking retardation, so s=u22a⇒s∝u2s = \frac{u^2}{2a} \Rightarrow s \propto u^2.
  2. s1s2=u2(4u)2=116\frac{s_1}{s_2} = \frac{u^2}{(4u)^2} = \frac{1}{16}
  3. So the answer is (d) 1:161 : 16.
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