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JAMB Physics 2008 Question 6

Question 6

Motion

If a wheel 1.2 m in diameter rotates at one revolution per second, calculate the velocity of the wheel

  1. A.3.6ms−1.
  2. B.3.8ms−1.
  3. C.4.0ms−1.
  4. D.7.5ms−1.
Show the answer and explanation

Answer: B (3.8ms−1.)

Explanation

In one second a point on the rim travels one circumference: πd = 3.14 × 1.2 ≈ 3.8 m, so v ≈ 3.8 m s−1.