Center of MassMedium
Question
Two particles of equal mass have initial velocities 2î ms-1 and 2ĵ ms-1. First particle has a constant acceleration (î − ĵ) ms-2 while the acceleration of the second particle is always zero. The centre of mass of the two particles moves in
Options
A.Circle
B.Circle
C.Ellipse
D.Straight line
Solution
vcm = 
∴ vcm =
acm =
vcm has same direction as of acm
∴ straight line.
∴ vcm =
acm =
vcm has same direction as of acm
∴ straight line.
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