NEET 2012 Physics question
Two persons of masses and respectively, are at the opposite ends of a boat. The length of the boat is and weighs . The man walks up to the man and sits with him. If the boat is in still water the centre of mass of the system shifts by
Answer: (4)
Solution
The system consists of the two persons and the boat. The only horizontal forces are internal (the man pushing on the boat and the boat pushing on him; water resistance is neglected for a boat in still water). With no external horizontal force and the system initially at rest, the centre of mass of the system cannot
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