AIPMT PRELIMS2012Physics-Mechanics
AIPMT PRELIMS 2012 Physics Center of Mass MCQ Question
Type: MCQ-conceptual-Medium-Class 11
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 weighs 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
A
0.75 m
B
3.0 m
C
2.3 m
D
zero
Correct Answer
Option D
Detailed Explanation
The center of mass of the system remains unchanged as there is no external force acting on the system.
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