Question

A block of mass m is placed in contact with another block of mass M
as shown in the figure. The coefficient of friction between the blocks
is p = 0.5. With what acceleration the block M should move so that
the block m does not slide down ? There is no friction between the
ground and block of mass M.​

Answer 1

Answer:

Explanation:

If the cart acceleration with ′α′

Pseudo force on mass F=mα

Force of friction =μN

For horizontal equilibrium F=N

f=μmα

The block will not fall as long as f≥mg

μmα≥mg

α≥g/μ

Hence d is the correct answer.

Answer 2

Answer:

Answer :

d

Solution :

Here the force applied should be such that friction force acting on the upper block ofshould not be more than the limiting frictionlet the system moves with acceleration a Then for whole system <br>...(i) <br> For block of m.<br>...(ii) <br> From Eqs (i) and (ii) we get br