Question

A string with one end fixed on a rigid wall
passing over a fixed frictionless pulley at a
distance of 2 m from the wall has a point
mass M =2 kg attached to it at a distance
of 1 m from the wall. A mass m=0.5 kg
attached at the free end is held at rest so
that the string is horizontal between the
wall and the pulley and vertical beyond the
pulley. When mass m is released, M will hit
the wall, then (g 10 m/s)

Answer 1

Answer:

First we will use energy conservation

Loss in gravitational potential energy = gain in kinetic energy of the two blocks

also by constraint relation we know that

where we know that

now we have

so the speed of the block M will be 3.4 m/s

Explanation: