Two identical buggies of each of mass `150 kg` move one after the other friction with same velocity
Channel: Doubtnut
Date: 2020-07-12

Two identical buggies of each of mass `150 kg` move one after the other friction with same velocity `4m/s`. A man of mass `m` rides the rear buggy. At a certain moment, the man jumps into the front buggy with a velocity v relative to his buggy.  As a result of this process, real boggy stops. If the sum of kinetic energies of the man and the front buggy just after collision with the from buggy differs from that just before collision by `2700 J` then  the mass `m` of the man is