Question

18 A child of mass m stands on a board of mass M which lies on a frictionless
horizontal surface. The child starts walking with a speed v with respect to the
ground. With what speed does the board recoil?
(A) 2mV/M2
(B) mV/M (C) V/M (D) V2
/m

Answer 1

Answer:

Option B is correct

Explanation: