Question

Blockes A and B are resting on a smooth horizontal surface given equal speeds of `2ms^(-1)` in opposite sense as shown in the figure.

At t=0, the position of blocks are shown, then the coordinates of center of mass t=3s will be
A. (1,0)
B. (3,0)
C. (5,0)
D. (2.25,0)

Answer 1

Correct Answer - D
At t=0 center of mass is at mid-point or at (2.25m, 0). Velocity of center of mas is zero. Hence center of mass will remain at this position all the time.