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For x = 5t^3, the acceleration at t = 1 s is
A5 m/s^2
B10 m/s^2
C30 m/s^2
D15 m/s^2
Answer & Solution
Correct answer: C. 30 m/s^2
v = 15t^2 and a = dv/dt = 30t, which is 30 m/s^2 at t = 1 s.
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