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JAMB Physics 1988 Question 5

Question 5

Scalars and Vectors

Which of the following quantities are scalars? I. Electrical potential II. Torque III. Momentum IV. Kinetic energy

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

Answer: D (I and IV only.)

Explanation

Electrical potential and kinetic energy have size only. Torque and momentum have direction, so they are vectors.