Question

What is the angular displacement of minute hand in 20 minute?
(Ans. 21/3 rad/s)
Calculate the angular speed and linear speed of tip of second hand
of a clock, if seconds hand is 4 cm long. ​

Answer 1

Explanation:

angular speed =1.746 x 10-3 rad/s

angular displacement of 20 minutes =2.095 rad, linear speed = 8.73 x 10-5 m/s.

Answer 2

Explanation:

It is simple: In 60 minutes, the minute hands makes a full revolution of 360 degrees. So in 20 minutes it revolves one third, or 120 degrees.