In the previous question, the magnitude of velocity of particle at the mentioned instant is

Options

A. `(piA)/(T)`
B. `(sqrt2piA)/(T)`
C. zero
D. `sqrt((7)/(8))xx(2piA)/(T)`

Answer

B

Explanation

Velocity at any displacement `x` is given by
`v=omegasqrt(A^2-x)`
So, the required velocity `=(2pi)/(T)sqrt(A^2-(A^2)/(2))=(sqrt2piA)/(T)`