A block of mass 4kg is kept on a rough horizontal surface as shown in the figure.A horizontal force of 19.4N is just able to slide the block (a) Find the coefficient of static friction.

Answers (1)

If F=19.4 N
Just able to slide, then frictional force (f) is given by
f=F=\mu N=\mu(4 g)$ \\ $\mu=\frac{F}{4 g}=\frac{19.4}{4 \times 9.8}=0.494 \approx 0.5$

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