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CBSE Class 11-science Answered

Two bodies of masses 2kg and 4kg moving with velocities 10m/s and 2m/s respectively towards each other. What is the velocity of their centre of mass?
Asked by AAKAASH PRAVINBABU | 10 Oct, 2015, 05:16: PM
answered-by-expert Expert Answer
begin mathsize 14px style The space velocity space of space centre space of space mass space of space the space system space is space given space as straight V subscript straight C equals fraction numerator straight m subscript 1 straight v subscript 1 plus straight m subscript 2 straight v subscript 2 over denominator straight m subscript 1 plus straight m subscript 2 end fraction equals fraction numerator 2 cross times 10 minus 4 cross times 2 over denominator 2 plus 4 end fraction space space left parenthesis Negative space because space both space are space moving space in space opposite space directions right parenthesis straight V subscript straight C equals fraction numerator 20 minus 8 over denominator 6 end fraction equals 12 over 6 equals 2 space straight m divided by straight s end style
Answered by Romal Bhansali | 11 Oct, 2015, 07:18: PM
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