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A ball attached to one end of a string swings in a vertical plane such that its acceleration at point A (extreme position) is equal to its acceleration at point B (mean position). The angle theta is

A ball attached to one end of a string swings in a vertical plane such that its acceleration at point A (extreme position) is equal to its acceleration at point B (mean position). The angle theta is 

Grade:12th pass

1 Answers

Vikas TU
14149 Points
2 years ago
Hiii Yashra
v^2/l = gsin(a)
where a is the maximum deflection from newtons law in projection form.
-mgsinQ = mv dv/ldQ
v^2 = 2glsonQdQ = 2gl(1-cosQ)
solving equations 
2gl (1-cosa) = lgcosa
cos(a) = 2/3 
a = 53 degree.
 

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