Q 11-03-038NEETJEE MainEasy
An aeroplane flying horizontally at $360$ km/h at a height of $500$ m wants to drop a food packet on a target on the ground. How far horizontally before the target should the packet be released? ($g = 10\ \text{m/s}^2$)
Answer: (C) $1000$ m
Concept. The packet keeps the plane's horizontal velocity while it falls.
Step 1. Speed. $360$ km/h $= 100$ m/s.
Step 2. Time of fall. $t = \sqrt{\dfrac{1000}{10}} = 10$ s.
Step 3. Distance. $100 \times 10 = 1000$ m.
Answer. $1000$ m (Option C).
Solution by Sreeraj P, M.Sc Physics