Question

Joule second is the unit of :

• A. momentum
• B. angular momentum
• C. work
• D. pressure

Answer 1

Answer: (B)

Angular momentum $=m\upsilon r$ $\text{=kilogram }\times \frac{\text{metre}}{\text{second}}\times \text{ metre}$ $\text{=kilogram }\times \frac{{\text{(metre)}}^{\text{2}}\times \text{ second}}{\text{second }\times \text{ second}}$ $=\left(kg\times \frac{metre}{{\sec }^2}\right)\times \sec$ $=joule\times \sec$