Question

A string passing over pulley contains $10kg$ and $6kg$ masses connected at its ends. The $6kg$ mass hangs vertically while $10kg$ block on the table. If the system is in dynamic equilibrium find the coefficient of dynamic friction.

Answer 1

For block of mass 6kg

$6g=T$

$T=60$ Newtons

For block of mass 10 kg

$T-fs=0$

$T=fs$

$fs=60$ Newtons

$fs=N\mu$

$N=10g=100$ Newtons

So, $\left(100\right)\mu =60$

$\Rightarrow \mu =0.6$