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Question: Answered & Verified by Expert
A block of mass $10 \mathrm{~kg}$ placed on the rough horizontal surface having coefficient of friction $\mu=0.5$, if a horizontal force of $100 \mathrm{~N}$ acting on it then acceleration of the block will be:
PhysicsLaws of MotionJEE Main
Options:
  • A $10 \mathrm{~ms}^{-1}$
  • B $5 \mathrm{~ms}^{-2}$
  • C $15 \mathrm{~ms}^{-2}$
  • D $0.5 \mathrm{~ms}^{-2}$
Solution:
2891 Upvotes Verified Answer
The correct answer is: $5 \mathrm{~ms}^{-2}$

Here $f_{\max }=\mu N=\mu m g$ $=0.5 \times 10 \times 10=50 \mathrm{~N}$ $\Rightarrow a=\frac{\text { net force }}{\text { mass }}$ $=\frac{100-50}{10}=5 \mathrm{~m} / \mathrm{sec}^2$

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