Kinematics Question 202

Question: An aeroplane is moving with horizontal velocity $ u $ at height $ h $ . The velocity of a packet dropped from it on the earth’s surface will be ( $ g $ it’s acceleration due to gravity) [MP PET 1995]

Options:

A) $ \sqrt{u^{2}+2gh} $

B) $ \sqrt{2gh} $

C) $ 2gh $

D) $ \sqrt{u^{2}-2gh} $

Show Answer

Answer:

Correct Answer: A

Solution:

Horizontal velocity of dropped packet $ =u $ Vertical velocity $ =\sqrt{2gh} $
$ \therefore $ Resultant velocity at earth $ =\sqrt{u^{2}+2gh} $



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