Q27 of 43 Page 85

Which is greater the angular velocity of the hour hand of a watch or angular velocity of earth around its axis?

Angular Velocity =

Where, = Angle Traversed and = Time Taken


Here,


One complete Round corresponds to angle =


Now, hour clock takes 12 hours to complete one round.


So, angular velocity =


Earth takes 24 hours to completely revolve around its axis.


So, earth’s angular velocity =


Thus, the angular velocity of hour hand of a watch is greater than the angular velocity of earth about its axis.


More from this chapter

All 43 →
25

A particle projected from the ground move at 45° with horizontal one second after projection and speed is minimum two seconds after projection. The angle of projection of particle is (neglect air resistance)?

 26

A vector ‘A’ points vertically upward and ‘B’ points towards north. The vector product Vector A multiply by Vector B is

 28

A train moving at a constant velocity of 54 kmhr–1 moves east wards for 30min then due north with the same speed for 40 min. What is the average velocity of the train during this run?

 29

A body moves 6 m north, 8 m east and 10m vertically upwards. What is its resultant displacement from the initial position?