# A bridge is in the form of a semi-circle of radius 40 m. The greatest speed with which a motor cycle can cross the bridge without leaving the ground at the highest point is (𝑔 = 10ms−2 ) (frictional force is negligibly small)

Question : A bridge is in the form of a semi-circle of radius 40 m. The greatest speed with which a motor cycle can cross the bridge without leaving the ground at the highest point is (𝑔 = 10ms−2 ) (frictional force is negligibly small)

(A) $40ms^{-1}$

(B) $20ms^{-1}$

(C) $30ms^{-1}$

(D) $15ms^{-1}$