a 5kg mass is thrown up with velocity 98ms.It explodes into 2pieces after 5sec.2kg piece moves upwards with velocity 55ms. velocity of 2nd piece iss
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velocity of the mass after 5 sec = u+at = 98-9.8[5] = 98-49 = 49 ms⁻¹
initial momentum = 5[49]
final momentum = 2[55]+3[x] [ x be the velocity of 3 kg mass ]
according to the law of conservation of linear momentum
initial momentum = final momentum
5[49] = 2[55]+3[x]
245=110+3x
3x = 245-110 = 135
x = 135/3 = +45 ms⁻¹ [ +ve sign indicates the 3 kg mass is also travels upward ]
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