Q.
A cart of mass $M$ has a block of mass $m$ in contact with it as shown in the figure-2.133. The coefficient of friction between the block and the cart is $\mu$. What is the minimum acceleration of the cart so that the block $m$ does not fall ?
Laws of Motion
Solution:
$N=m a$
To prevent block $m$ from falling,
$\mu N >m g $
$ \mu m a >m g $
$ a >\frac{g}{\mu} $
