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A position is given by x = 3t^2 (x in m, t in s). What is the velocity at t = 2 s?
A24 m/s
B3 m/s
C12 m/s
D6 m/s
Answer & Solution
Correct answer: C. 12 m/s
v = dx/dt = 6t, which is 12 m/s at t = 2 s.
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