A ball is dropped from a balloon going up at a speed of 7 m/s. If the balloon was at a height of 60 m at the time of dropping the ball, how long will the ball take in reaching the ground and what will be its displacement ?
1 Answer
Displacement will be
Explanation:
When the ball will be dropped,it will have an initial velocity of
Now,let it will take time
so using
Here,
So,our equation becomes,
Solving,we get,
ALTERNATIVELY
So,let's calculate the time taken by it to reach the maximum height above the point of release.
using,
At its highest point,
So,
So,after this it will start falling downwards due to the effect of gravity,so net displacement will be
Now to come down by that distance it will take the same amount of time,so to reach its point of release from its highest point,it will take a total of
Let,it will take further time
So,using
Here,
So,our equation becomes,
Solving,we get,
So,total time required to come back to the ground is