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} $
