# Answer on Mechanics | Relativity Question for boite

Question #40732

Consider a system of three equal mass particles moving in a plane; their positions are given by

ˆi ˆj

i i a + b .

For particle 1, 3 4, 1 0

2

a1 = t + b =

For particle 2, a2 = 7t + 5, b2 = 2

For particle 3, a3 = 2t, b3 = 3t + 4

Determine the position and velocity of the centre of mass as functions of time.

ˆi ˆj

i i a + b .

For particle 1, 3 4, 1 0

2

a1 = t + b =

For particle 2, a2 = 7t + 5, b2 = 2

For particle 3, a3 = 2t, b3 = 3t + 4

Determine the position and velocity of the centre of mass as functions of time.

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