A girl of mass 40kg jumps with horizontal velocity 5m/s onto a stationary cart of mass 3kg with frictionless wheels. Find her velocity as the cart starts moving.
A
4.65m/s
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B
5.65m/s
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C
6.65m/s
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D
0m/s
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Solution
The correct option is A4.65m/s From law of conservation of linear momentum,