A block of mass 0.1 is held against a wall applying a horizontal force of 5N on block. If the coefficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is:

Options

A. 2.5 N
B. 0.98 N
C. 4.9 N
D. 0.49 N

Answer

B

Explanation

(b) N=F=5N lt brgt `therefore" " f_("max")=mu N=2.5 N`
`w=mg=0.1xx9.8=0.98N`
Since `w lt f_("max")`, force of friction will be 0.98 N