Two bodies of masses 5 and 7 kilograms are initially at rest on a horizontal…
PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
17. Two bodies of masses 5 and 7 kilograms are initially at rest on a horizontal frictionless surface. A light spring is compressed between the bodies, which are held together by a thin thread. After the spring is released by burning through the thread, the 5 kilogram body has a speed of 0.2m/s. The speed of the 7 kilogram body is (in m/s)
(A) 121
(B) 71
(C) 51
(D) 351