1.

A 1 kg block is a given a velocity of 15 m//s towards right over a very long rough plank of mass 2kg placed on a smooth horizontal surface as shown in figure. If coeficient of friction between the two blocks is equal toi 0.4 then magnitude of initial slope (in S.I unit)P_(1) versust and P_(2) versus t (in SI unit) will be:

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4 and 2
2 and 4
4 and 4
2 and 2

Answer :C


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