The Velocity of the Center of Mass of a System

question 53

Multiple Choice

The velocity of the center of mass of a system of particles changes as v = 4.5 t + 2.4 t² + 1.1 t³, where v is in meters per second.If the system starts from rest at t = 0, what is its acceleration at t = 3.0 s?

• A)7.1 m/s²
• B)14 m/s²
• C)20 m/s²
• D)49 m/s²
• E)65 m/s²

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