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Q.

A body of mass 100 g is made just to slide on a rough surface by applying a force of 0.8 N. Then the coefficient of friction is $(g = 10 {ms}^{- 2})$

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a

0.08

b

0.6

c

0.7

d

0.8

answer is A.

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Detailed Solution

m = 100 g = 0.1 kg

$f_{ms} = 0.8 N$

$f_{ms} = μ_{s} N$

$f_{ms} = μ_{s} mg$

$0 .8 = μ_{s} \times 0.1 \times 10$

$μ_{s} = 0.8$

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