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JAMB Physics 2011 Question 6

Question 6

Motion

An object of mass 2 kg moves with a velocity of 10 ms−1 round a circle of radius 4 m. Calculate the centripetal force on the object.

  1. A.50 N
  2. B.40 N
  3. C.25 N
  4. D.100 N
Show the answer and explanation

Answer: A (50 N)

Explanation

F = mv2/r = 2 × 102 ÷ 4 = 50 N.