Kinematics Question 242
A balloon is rising 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 (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 a rising 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 10^2 $ = ? 290 + 490 = 200 m.
BETA
