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JAMB Physics 2000 Question 8

Question 8

Motion

The velocity v of a particle in a time t is given by the equation v = 10 + 2t2. Find the instantaneous acceleration after 5 seconds.

  1. A.10 m s−2
  2. B.15 m s−2
  3. C.20 m s−2
  4. D.60 m s−2
Show the answer and explanation

Answer: C (20 m s−2)

Explanation

a = dv/dt = 4t. At t = 5 s, a = 20 m s−2.