Question

With what minimum acceleration mass $M$ must be moved on frictionless surface so that $m$ remains stick to it as shown in figure-2.171. The co-efficient of friction between $M\, \&\, m$ is $\mu$ :

• A. $\mu g$
• B. $\frac{g}{\mu}$
• C. $\frac{\mu m g}{M+m}$
• D. $\frac{\mu m g}{M}$

Answer 1

Answer: (B)

$ N =m a $
$f_{\max } =\mu N=m g $
$ \mu m a =m g $
$ a =\frac{g}{\mu} $