Practice question · Match the pairs
Match each quantity to its SI unit.
- Work
- Power
- Force
- Momentum
- Watt (W)
- kg·m/s
- Joule (J)
- Newton (N)
Hints
- Build each unit from the definition rather than recalling the name.
- Energy per unit time and momentum have quite different units.
Show the answer
- Work → Joule (J)
- Power → Watt (W)
- Force → Newton (N)
- Momentum → kg·m/s
Why
Work and energy share the joule. Power is energy per time (W = J/s), and momentum has its own unit, kg·m/s, it is not a form of energy.
Practise Work, Energy, and the Work-Energy Theorem
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