# i need help with this question

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#1
A shell of mass 6.0kg traveling with an unknown speed v traveling horizontally explodes into
two parts. One part of mass 4.0kg continues in the original direction with a speed of 80ms-1
and the other part continues in the same direction with a speed of 140ms-1
.
Calculate the initial unknown speed v.
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3 years ago
#2
(Original post by ZKhan158)
A shell of mass M = 6.0 kg traveling with an unknown speed v traveling horizontally explodes into two parts. One part of mass m1 = 4.0 kg continues in the original direction with a speed of v1 = 80 m s−1 and the other part continues in the same direction with a speed of v2 = 140 m s−1. Calculate the initial unknown speed v.

Use conservation of linear momentum, the total linear momentum before explosion is equal to the total linear momentum after explosion

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Mv = m1 v1 + m2v2

The variables are found in the question that I quoted.

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