Question

Angular speed of the hour hand of a clock in degree per second is :

• A. $\frac{1}{30}$
• B. $\frac{1}{60}$
• C. $\frac{1}{120}$
• D. $\frac{1}{720}$

Answer 1

Answer: (C)

$\frac{1}{120}$

Time taken by the hour hand to complete one rotation of ${360}^o$ is $12$ hours $i.e.43200$ seconds

Thus its angular velocity $w=\frac{360}{43200}$

We get $w=\frac{1}{120}$ degree per second