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  4. A helicopter is flying horizontally at an altitude of 2 km with a speed of 100 ms- 1 . A packet is dropped from it. The horizontal distance between the point where the packet is dropped and the point where it hits the ground is (.g=10 ms- 2.)

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Q. A helicopter is flying horizontally at an altitude of 2 km with a speed of $100 \, ms^{- 1}$ . A packet is dropped from it. The horizontal distance between the point where the packet is dropped and the point where it hits the ground is $\left(\right.g=10 \, ms^{- 2}\left.\right)$

NTA AbhyasNTA Abhyas 2020Motion in a Plane

Solution:

$t = \sqrt{\frac{\text{2h}}{\text{g}}} = \sqrt{\frac{\left(2\right) \left(\text{2000}\right)}{\text{10}}} = \text{20} sec$
$x = \left(\text{100}\right) \left(\text{20}\right) = \text{2} km$