The angular speed of the second hand of a watch is a 1800 ra

The angular speed of the second hand of a watch is:

a) (/1800) rad/s

b) (/60) rad/s

c) (/30) rad/s

d) (2) rad/s

e) (60) rad/s

Solution

Ans: C

the clock is a circle and hence thus the hands of the clocks complete 360 degrees while moving one rotation. The second hand does this in 1 minute i.e 60 seconds. and that means in one second it moves 6 degrees and that is equal to /30 rad/s