Question

Which is greater the angular velocity of the hour hand of a watch or angular velocity of earth around its own axis? Give their ratio CLASS - XI PHYSICS (Kinematics)

Answer 1

Hour hand of a watch or a clock turns 1 complete circle in 12 hours.  Its angular velocity = 2 π / 12 hours = π/6 radians / hour

Angular velocity of revolution of earth around its own axis = 2π / 24 hours

     = π/12 radians / hour

So the angular velocity of the Hours hand in a watch is more than that of the Earth about its own axis.