Question : A particle moving along a straight line has a velocity 𝑣 ms−1 , when it cleared a distance of 𝑦 meter. These two are connected by the relation 𝑣 = √49 + 𝑦. When its velocity is 1 ms −1 , its acceleration (in ms −2 )
(A) 1
(B) 2
(C) 7
(D) 0.5
Answer : option (D)
Solution :
