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A wheel making 20 revolutions per second is stopped in 20 seconds Its angular retardation is?

A wheel making 20 revolutions per second is stopped in 20 seconds Its angular retardation is? 
 

Grade:11

2 Answers

Vikas TU
14149 Points
one year ago
 
Dear studnet 
Wheel making 20 revolution per second 
Means angular velocity = 20 rev/second
Time = 20 second 
angular acceleration = 20*2pi / 20 
We multiply by 2*pi because in 1 revolution , the wheel is covering this much radian.
so, angular acceleration = 2pi 
 
Yashraj
915 Points
11 months ago
  1. Practice previous year questions many times..
  2. Appear for a test series and analyse it properly (Giving 2–3 hours)
  3. Revise your notes multiple times till they enter your soul :)
  4. Find your strong points and chapters, work on them..
  5. Solve other people’s doubts. It makes your own concepts very clear

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