Kinematics Question 402
Question: A stone is dropped from a r it’sing balloon at a height of 76 m above the ground and reaches the ground in 6s. What was the velocity of the balloon when the stone was dropped? Take $ g=10m/s^{2} $
Options:
A) $ \frac{52}{3}m/s $ upward
B) $ \frac{52}{3}m/s $ downward
C) $ 3m/s $
D) $ 9.8m/s $
Show Answer
Answer:
Correct Answer: A
Solution:
$ \text{S=ut+}\frac{1}{2}a{{t}^{2}} $
$ -76=4\times 6-\frac{1}{2}\times 10\times {{( 6 )}^{2}}\Rightarrow u=\frac{52}{3}\text{ m/s} $
