Two persons of masses `55 kg` and `65 kg` respectively are at the opposite ends of a boat. The length of the boat is `3.0 m` and weights `100 kg`. The `55 kg` man walks up to the `65 kg` man and sits with him. If the boat is in still water the centre of mass of the system shifts by.

Options

A. 3.0 m
B. 2.3 m
C. zero
D. 0.75 m

Answer

C

Explanation

Here on the entire system net external force on the system is zero, hence center of mass remains unchanged.