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WAEC Further Mathematics 2010 Question 36

Question 36

Dynamics

A bicycle wheel of diameter 70cm covered a distance of 350cm in 2 seconds. How many radians per second did it turn?

  1. A.5
  2. B.7
  3. C.8
  4. D.10
Show the answer and explanation

Answer: A (5)

Explanation

Radius = 35 cm, so the angle turned is 350/35 = 10 radians in 2 seconds, i.e. 5 radians per second.