In the given figure the acceleration of $M$ is $(g = 10 \,ms^{-2})$
$\frac{20}{3} \, ms^{-2}$
$17\, ms^{-2}$
$\frac{80}{3} \, ms^{-2}$
None of these
Why are mountain roads generally made winding upwards rather than going straight up ?
A uniform chain of length $L$ changes partly from a table which is kept in equilibrium by friction. The maximum length that can withstand without slipping is $l$, then coefficient of friction between the table and the chain is
In the figure, a block of weight $60\, N$ is placed on a rough surface. The coefficient of friction between the block and the surfaces is $0.5$. ........ $N$ should be the maximum weight $W$ such that the block does not slip on the surface .
A chain of length $L$ rests on a rough table. If $\mu $ be the coefficient of friction, the maximum friction of the chain that can hang over the table will be
A marble block of mass $2\, kg$ lying on ice when given a velocity of $6\, m/s$ is stopped by friction in $10s$. Then the coefficient of friction is-