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Physics

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A north going zack has a mass of 80 kg and is travelling at 4m/s.a south going zack has a mass of 40 kg and is travelling of 5m/s of they have a perfectly inelastic collision,what is their final velocity?

Sagot :

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Answer:

by liner momentum conservation

50' 4 + 40 '5=90'v

(since they stick After collision)

v = 400 ÷ 90

initial kinetic energy =(50 '16)÷2+(40'25)÷2

=400 + 500 =900

final KE = (90 ' 400 '400)÷(90'90'2)

=8000÷9

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