Question

Joule-second is the unit of

• A. Work
• B. Momentum
• C. Pressure
• D. Angular momentum

Answer 1

Answer: (D)

Angular momentum

Answer 2

$\tau = \frac{dL}{dt}$ ⇒ $dL = \tau \times dt = r \times F \times dt$

i.e. the unit of angular momentum is joule-second.