Question

Two balls $A$ and $B$ are thrown simultaneously from the top of a tower. $A$ is thrown vertically up with a speed of $4 ms ^{-1} . B$ is thrown vertically down with a speed of $4 ms ^{-1}$. The ball $A$ and $B$ hit the ground with speed $v_{A}$ and $v_{B}$ respectively. Then,

• A. $v_{A} < v_{B}$
• B. $v_{A} > v_{B}$
• C. $v_{A} \geq v_{B}$
• D. $v_{A} = v_{B}$

Answer 1

Answer: (D)

When $A$ retums to the level of top of tower, its downward velocity is $4 ms ^{-1}$. This velocity is the same as that of $B$. So, both $A$ and $B$ hit the ground with the same velocity.