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JAMB Physics 1988 Question 2

Question 2

Measurement and Units

Which of the following are the correct SI units of the quantities indicated? I. N (Force) II. N m−1 (Torque) III. Watt (Power) IV. kg m s−2 (Momentum)

  1. A.I and II only
  2. B.I, II and III only
  3. C.I, II and IV only
  4. D.I and III only.
Show the answer and explanation

Answer: D (I and III only.)

Explanation

Force is in newtons and power in watts. Torque is in N m (not N m−1) and momentum in kg m s−1 (not kg m s−2).