Boy and girl sailing on a boat(the boat mass is:25 kg), the boy mass is: 95kg and mass of the girl is smaller from boy
When the boat was at rest in quiet water the boy ang girl exchanged their place.
Both were symmetrically about the center of the boat and the distance between them was 3.0 m
After they switched place the guy saw thet boat moved at 40cm relation to log which was beside of the boat,
What is a girl's mass?

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Hi
you can solve this by relation of displacement center of mass

sum of moments of masses about the centre of mass is equal to zero. you can use this concept

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