Two persons of masses 60kg and 80kg respectively, are at the opp. ends of a boat. The length of the boat is 4m and weighs 100kg. Both persons move towards each other and sit in the middle. The centre of mass of system shifts by.
(1) 0.25m
(2) 0.5m
(3) 0.75m
(4) 0
explain me with explanation..!!
Answers
Answered by
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Given :
▪ Mass of person A = 60kg
▪ Mass of person B = 80kg
▪ Length of boat = 4m
▪ Mass of boat = 100kg
▪ Both persons move towards each other and sit in the middle.
To Find :
▪ Change in position of centre of mass.
Concept :
↗ Here on the entire system net external force on the system is zero hence centre of mass remains unchanged.
↗ When the total external force on the system is zero, the velocity of the centre of mass remains constant/zero.
☆ Ans-D → 0m
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