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The motion of a particle is described by the position vector: r = Ct3 i + 4t2 j + 5 k where C is a constant and denotes time. If its speed at t = 2s is 20m/s, what is the magnitude of the acceleration at that instant?

The motion of a particle is described by the position vector: r = Ct3 i + 4t2 j + 5 k where C is a constant and denotes time. If its speed at t = 2s is 20m/s, what is the magnitude of the acceleration at that instant?

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The motion of a particle is described by the position vector: r = Ct3 + 4t2 j + 5 k where C is a constant and t denotes time. If its speed at t = 2s is 20m/s, what is the magnitude of the acceleration at that instant?
Transcribed Image Text:The motion of a particle is described by the position vector: r = Ct3 + 4t2 j + 5 k where C is a constant and t denotes time. If its speed at t = 2s is 20m/s, what is the magnitude of the acceleration at that instant?
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