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explain Inverse Square rule of 9th class in gravitation chapter

Answer 1

find in physics book of lakhmir singh

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Amarnathreddy answered 3 year(s) ago

Newton's inverse square rule....

Angular accerleration proportional to v2 / r. Explain briefly. 

Class-IX Physics

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Asked by Anurag

Jun 7

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Amarnathreddy , SubjectMatterExpert

Member since Jul 09 2013

Angular acceleration proportional to v2 / r   Explain briefly. 
Answer: Angular acceleration is defined as the rate of change in angular velocity
 
Angular acceleration α = dω/dt
 
Linear acceleration a = r α ⇒ α = a/r
Or
α = (1/r)a, but a = v2 / r    
 
α = (1/r) (v2 / r ), , where r is the radius vector which is a constant.
Angular acceleration  is directly proportional to v2 / r