Physics And Measurement Question 319
Question: Joule-second is the unit of
[CPMT 1990; CBSE PMT 1993; BVP 2003]
Options:
A) Work
B) Momentum
C) Pressure
D) Angular momentum
Show Answer
Answer:
Correct Answer: D
Solution:
$ \tau =\frac{dL}{dt} $
therefore $ dL=\tau \times dt $
$ =r\times F\times dt $ i.e. the unit of angular momentum is joule-second.