Question

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

• A. 0.16
• B. 0.08
• C. 0.8
• D. 1.6

Answer 1

The correct option is C 0.8

block is placed on the horizontal plane, so $mg=N$

also maximum friction force is $\mu .N$, which is 0.8 N.

friction force will be equal to force applied until it reaches its maximum value. After that limiting friction will act and body will start moving.

so $\mu .N=98=>\mu .\times 0.1\times 10=0.8$

$=>\mu =0.8$