The SI unit of pressure is ________.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Pascal
Pressure is force per unit area, so its SI unit is newton per square metre, which is named the pascal (Pa): 1 Pa \(=1\,\mathrm{N/m^2}\).
Why the other options are incorrect
Option (1) Watt — Incorrect. The watt is the SI unit of power (joule per second).
Option (3) Newton — Incorrect. The newton is the SI unit of force, not force per unit area.
Option (4) Dyne/cm3 — Incorrect. The CGS unit of pressure is dyne/cm2; force per unit volume is not pressure, and the CGS system is not SI.