What is the displacement of the point of a wheel initially in contact with the ground when the wheel rolls forward half a revolution ? Take the radius of the wheel as R and the the x - axis as the forward direction ?

Options

A. `R sqrt(pi^(2) + 9), Tan^(-1) ((3)/(pi))` with x-axis
B. `R sqrt(pi^(2) + 4)` and angle `Tan^(-1) ((2)/(pi))` with x-axis
C. `R sqrt(pi^(2) + 16), Tan^(-1) ((4)/(pi))` with x-axis
D. None

Answer

B