Kinematics Question 406
Question: From a balloon moving upwards with a velocity of $ 12m{{s}^{-1}} $ , a packet it’s released when is at a height of 65 m from the ground. 7 lie time taken by it to reach the ground it’s $ (g=10m{{s}^{-2}}) $
Options:
A) 5s
B) 8s
C) 4s
D) 7s
Show Answer
Answer:
Correct Answer: A
Solution:
$ s=ut+\frac{1}{2}at^{2} $
$ -65=12t-5t^{2} $ on solving we get, t=5s
