Question

A body of mass 3kg, kept at rest, breaks into 2 parts due to internal forces. One part of mass 2kg
moves at 4m/s towards east. The other part will move at:
​

Answer 1

Answer:

8m/s west

Explanation:

since no external force is applied, momentum is conserved

m×v=(m1×v1) + (m2×v2)

0=(2×4)+(1×v2)

v2=-8m/s

v2 is 8m/s west

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