The SI unit of work is:

Solution

Physics sir · 2 steps

Work is force times distance, so its unit is a newton times a metre, and that is the joule.

1. Start from the definition. Work done by a constant force along the displacement is W = F × s.

   1 J = 1 N × 1 m = 1 kg m² s⁻²

   Unit	Measures	In base units
   newton	force	kg m s⁻²
   pascal	pressure (force per area)	kg m⁻¹ s⁻²
   joule	work and energy	kg m² s⁻²
   watt	power (work per second)	kg m² s⁻³

2. So. Only the joule matches force times distance, so the answer is (c).

The idea to keep. Build a unit from the defining formula: work is force times distance, power is work per second, pressure is force per area. Then the units sort themselves out.

Answer from the NTA final answer key. Solution by PrepWiser.