Three Particles Are Placed in the Xy Plane

question 45

Multiple Choice

Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (-2, -2) m. Where must a 20-g particle be placed so that the centre of mass of the three-particle system is at the origin?

• A)(-3, -1) m
• B)(+1, +3) m
• C)(+3, -1) m
• D)(-1, -3) m
• E)(-0.5, -2) m

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