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JEE Main 11 Jan 2019 Shift 2 Solved Paper

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Question : 2

Total: 90

A particle of mass m is moving in a straight linewith momentum p. Starting at time t = 0, a forceF = kt acts in the same direction on the movingparticle during time interval T so that itsmomentum changes from p to 3p. Here k is aconstant. The value of T is :

2 √
p
k
√
2p
k
√
2k
p
2 √
k
p

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