Question

The length of hour hand of a wrist watch is $1.5cm$. Find magnitude of Angular velocity?

Answer 1

Length of hour hand of a wrist watch is $1.5$cm

We know $\omega =\frac{2\pi }{T}$

where $T$ is the time taken to complete one circle by hour hand,$\omega$ is the angular velocity of hour hand.

$T=12\times 60\times 60$secs$=43200$secs

$\omega =\frac{2\pi }{12\times 60\times 60}=1.454\times {10}^{-4}$rad/s