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A wedge of mass M=4 m lies on a frictionless plane. A particle of mass m approaches the wedge with speed ν . There is no friction between the particle and the plane or between the particle and the wedge. The maximum height climbed by the particle on the wedge is given by :

1. g 7 2 2 ν
2. g 2 2 ν
3. g 5 2 2 ν
4. g 2 ν

Correct answer: g 5 2 2 ν

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