A system consists of three masses mA= 0.4 kg, mB= 0.5 kg, and mC= 0.8 kg. The system is positioned in the xy plane with positions A (1,2) , B (4,4) , and C (2,5) in meters and initially at rest. Determine: a.  Center of mass of the system . b. If objects B and C act on external forces of 10i + 20j N and 16i N, respectively, evaluate the center of mass acceleration of the system after 2 s. c.  The center of mass of the system is 2 s after the force acts on B and C.

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Chapter1: Units, Trigonometry. And Vectors
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A system consists of three masses mA= 0.4 kg, mB= 0.5 kg, and mC= 0.8 kg. The system is positioned in the xy plane with positions A (1,2) , B (4,4) , and C (2,5) in meters and initially at rest. Determine:

a.  Center of mass of the system .
b. If objects B and C act on external forces of 10i + 20j N and 16i N, respectively, evaluate the center of mass acceleration of the system after 2 s.
c.  The center of mass of the system is 2 s after the force acts on B and C.

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