An iron ball of mass `m`, suspended by a light inextensible string of length `l` from a fixed point `O`, is shifted by `theta_(0)` as shown so as to strike the vertical wail perpendicularly.The maximum angle made by the string with vertical after the first collision, if `e` is the coefficient of restitution, is A. `sin^(-1){1-e^(2)(1-costheta_(0))}`B. `cos^(-1){1-e^(2)(1-costheta_(0))}`C. `tan^(-1){1-e^(2)(1-costheta_(0))}`D. zero

An iron ball of mass `m`, suspended by a light inextensible string of

1.	An iron ball of mass `m`, suspended by a light inextensible string of length `l` from a fixed point `O`, is shifted by `theta_(0)` as shown so as to strike the vertical wail perpendicularly.The maximum angle made by the string with vertical after the first collision, if `e` is the coefficient of restitution, is A. `sin^(-1){1-e^(2)(1-costheta_(0))}`B. `cos^(-1){1-e^(2)(1-costheta_(0))}`C. `tan^(-1){1-e^(2)(1-costheta_(0))}`D. zero
Answer» Speed just before collision `=sqrt(2gl(1-costheta_(0)))` Speed just after collision`=esqrt(2gl(1-costheta_(0)))` From `COE`, `(1)/(2)me^(2)[2gl(1-costheta_(0))]=mgl(1-costheta)` `:. theta=cos^(-1){1-e^(2)(1-costheta_(0))}`

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