Question : A body is thrown vertically up with a velocity 𝑢. It passes three points 𝐴, 𝐵 and 𝐶 in its upward journey with velocities 𝑢2 , 𝑢 3 and 𝑢 4 respectively. The ratio of the separations between points 𝐴 and 𝐵 between 𝐵 and 𝐶, 𝑖𝑒, 𝐴𝐵/𝐵𝐶 is
(A) 1
(B) 2
(C) 10/7
(D) 20/7
Answer : option (D)
Solution :
