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Roop
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Lina (50 kg) is moving east at 5 m/s. She collides with Emily (70 kg) moving at 2 m/s due west. They hold on to each other and
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Use formula v=u+a*t, 8=0+ a*2.....a=4 m\sec2
No the work done is mgl I.e. u did not take gravity into consideration..so it is 450*9.8*3=44129.4 J
