Q 11-03-037NEETJEE MainEasy
Two stones are thrown horizontally in opposite directions from the top of an $80$ m tall tower, with speeds $15$ m/s and $25$ m/s. The distance between the points where they land is ($g = 10\ \text{m/s}^2$)
Answer: (B) $160$ m
Concept. Both stones fall for the same time and move apart horizontally.
Step 1. Time. $t = \sqrt{\dfrac{160}{10}} = 4$ s.
Step 2. Separation. $(15 + 25) \times 4 = 160$ m.
Answer. $160$ m (Option B).
Solution by Sreeraj P, M.Sc Physics