Question : A point starts moving in a straight line with a certain acceleration. At a time 𝑡 after beginning of motion the acceleration suddenly becomes retardation of the same value. The time in which the point returns to the initial point is
(A) \sqrt{2t}
(B) \left( 2+\sqrt{2}\right) t
(C) \dfrac{t}{\sqrt{2}}
(D) Cannot be predicted unless acceleration is given
Answer : option (B)
Solution :
