Physicshard · Past Paper
An object is moving such that its velocity is v = 3t^2 + 2t. What is its acceleration at t = 2s?
A14 m/s^2
B12 m/s^2
C18 m/s^2
D10 m/s^2
✓ Correct Answer: A — 14 m/s^2
a = dv/dt = 6t + 2. At t=2, a = 6(2) + 2 = 14.
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