Question Detail
Question
Which of the following are the correct S.I. units of the quantities indicated? I. Ns (Momentum) II. Nm (Work) III. Watt/s (Power) IV. kgm/s (Force).
Correct Answer
Option A is the correct answer.
Detailed Explanation
Momentum has units kg m/s, which is equivalent to N·s (since 1 N = 1 kg m/s², so N·s = kg m/s). Work has units N·m (Joule). Power has units Watt (J/s), not Watt/s. Force has units kg m/s² (Newton), not kg m/s. So only I and II are correct.
Hint
Check each unit against the definition of the quantity.