Question

Three point masses 2m,m,2m are connected by the help of two ideal strings each of length l are placed over smooth horizontal xy plane and middle mass is given a velocity v as shown . Acceleration of mass 2m just after mass m is given velocity v is

Answer 1

Explanation:

when the middle one will be provided with a velocity the both mass of 2m will come into circular motion and hence particle at b will have centripetal acceleration of (v•^2)/l.....so as a will have the same the answer will be 3