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Question: Answered & Verified by Expert
Consider a car moving on a straight road with a speed of $100 \mathrm{~m} / \mathrm{s}$. The distance at which car can be stopped is $\left[\mu_{\mathrm{k}}=0.5\right]$
PhysicsLaws of MotionJEE MainJEE Main 2005
Options:
  • A
    $800 \mathrm{~m}$
  • B
    $1000 \mathrm{~m}$
  • C
    $100 \mathrm{~m}$
  • D
    $400 \mathrm{~m}$
Solution:
1618 Upvotes Verified Answer
The correct answer is:
$1000 \mathrm{~m}$
$\mu_{\mathrm{k}} \mathrm{mgs}=\frac{1}{2} \mathrm{mu}^2$
$\mathrm{~s}=\frac{\mathrm{u}^2}{2 \mu_{\mathrm{k}} \mathrm{g}}=1000 \mathrm{~m}$

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