Q. A body of mass 1kg flying at 72km/h. It explodes into two pieces. One piece of
mass 0.5kg just stops. What is the speed of the other?
plz help me
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Answer:
144 km/h
Explanation:
Apply momentum conservation.
Initially, particle has a velocity of 72 km/ h
Finally, one 0.5 kg mass has no velocity and assume that the other has velocity v.
P(i) = P(f)
72×1 = 0.5×0 + 0.5×v
ie ;
v/2 = 72
v=72×2 = 144 km/h.
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