Answer to Question #103024 in Mechanics | Relativity for Aseer

Question

A ball (20g)is released From (1m) above ground while it is connected to a string and hits a (40g) block causing the block to move over a rough surface and stops after (20m)
Find friction?

Answer 1

From the conservation of energy:

$$mgh=\mu Mgd$$

The friction coefficient:

$$\mu =\frac{mh}{Md}$$

$$\mu =\frac{(20)(1)}{(40)(20)}=0.025$$