Laws Of Motion Question 125

Question: A body is moving along a rough horizontal surface with an initial velocity $ 6m/s. $ If the body comes to rest after travelling 9 m, then the coefficient of sliding friction will be [BCECE 2004]

Options:

A)0.4

B)0.2

C)0.6

D)0.8

Show Answer

Answer:

Correct Answer: B

Solution:

We know $ s=\frac{u^{2}}{2\mu \ g} $

$ \therefore $ $ \mu =\frac{u^{2}}{2gs}=\frac{{{(6)}^{2}}}{2\times 10\times 9}=0.2 $



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