Question

From a building two balls `A` and `B` are thrown such that `A` is thrown upwards and `B` downwards ( both vertically with the same speed ). If `v_(A) and v_(B)` are their respective velocities on reaching the ground , then
A. ` v_(B) gt v_(A)`
B. ` v_(A) = v_(B)`
C. ` v_(A) gt v_(B)`
D. their velocities depend on their masses.

Answer 1

Correct Answer - B
Ball `A` is thrown upwards from the building . During its downward journey when it comes back to the point of throw , its speed is equal to the speed of throw . So, for the journey of both the balls from point `A to B`.
We can apply `v^(2) - u^(2) = 2 gh`.
As `u, g, h`, are same for both the balls , ` v_(A) = v_(B) `