Question

pls answer question number 4

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Answer 1

Since no external force acts on them, the net change in momentum is zero.

Initial momentum = Final Momentum

(100 x 2) + (200 x 1) = (100 x 1.67) + (200 x V)

V = 1.165 m/s.

Hence the second object moves with 1.165 m/s in the same direction.