Kinematics Question 242

Question: A balloon it’s r it’sing vertically up with a velocity of 29 ms?1. A stone is dropped from it and it reaches the ground in 10 seconds. The height of the balloon when the stone was dropped from it’s (g = 9.8 ms^2) [KCET 2004]

Options:

A) 100 m

B) 200 m

C) 400 m

D) 150 m

Show Answer

Answer:

Correct Answer: B

Solution:

For stone to be dropped from r it’sing balloon of velocity 29 m/s. $ u=-\ 29\ m/s, $ t = 10 sec.
$ \therefore h=-\ 29\times 10+\frac{1}{2}\times 9.8\times 100 $ = ? 290 + 490 = 200 m.



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