Which of the following are the correct S.I units of the quantities indicated? (i) Torque (Nm) (ii) m

Check each quantity in turn.

(i) Torque = force × distance, so its unit is N m. Correct.

(ii) Momentum = mass × velocity, so its unit is kg m s⁻¹, not kg m s⁻². The unit given is that of force. Wrong.

(iii) Power is energy per second, so its unit is the watt itself (J s⁻¹). “Watt/s” is wrong.

(iv) Pressure = N m⁻² = kg m s⁻² ÷ m² = kg m⁻¹ s⁻². Correct.

So the answer is (i) and (iv) only.