Question

Two kids standing on different floors of an apartment block drop balls from the balconies. The second kid standing at a lower level drops the ball 2 seconds after the first kid does. Both the balls reach together. Find the heights between the two balconies? (Take g = 10 m $s^{-2})$

• A. 20 m
• B. 40 m
• C. 80 m
• D. 160 m

Answer 1

Answer: (A)

20 m

First ball travels a distance of h within

2sec thus -

$h=\frac{1}{2}g\times (2{)}^2$

$h=20m$

Correct option is (A).