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 m and weighs 100 kg. The 55 kg man walks upto the 65 kg man and sits with him. If the boat is in still water, the centre of mass of the system shifts by

Question

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 m and weighs 100 kg. The 55 kg man walks upto the 65 kg man and sits with him. If the boat is in still water, the centre of mass of the system shifts by (A) 3 m (B) 2.3 m (C) zero (D) 0.75 m

Tardigrade Admin · Accepted Answer

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

Q. Two persons of masses 55kg and 65kg respectively, are at the opposite ends of a boat. The length of the boat is 3m and weighs 100kg. The 55kg man walks upto the 65kg man and sits with him. If the boat is in still water, the centre of mass of the system shifts by

3 m

2.3 m

zero

0.75 m

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

Q. Two persons of masses $55 k g$ and $65 k g$ respectively, are at the opposite ends of a boat. The length of the boat is $3 m$ and weighs $100 k g$ . The $55 k g$ man walks upto the $65 k g$ man and sits with him. If the boat is in still water, the centre of mass of the system shifts by