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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 θ A)cos^1 (2/5) b)cos^1 (4/5) c)cos^1 (3/5) d) none of these ans= (b)

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 θ
A)cos^1 (2/5)
b)cos^1 (4/5)
c)cos^1 (3/5)
d) none of these

ans= (b)


 


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Grade:12

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