Question

A baloon is moving upwards with velocity 10m/s. It releases a stone which comes down to the grond in 11s. What is the height of the baloon from the ground at the instant the stone was dropped​

Answer 1

Answer:

A ballon moving upwards with constant velocity 10m/s . if we release the stone from ballon , then, initial speed of stone = 10m/sec .

now,

initial speed = 10m/sec

time = 11sec

let H is the height of ballon when stone is dropped .

use kinematics equation ,

S = Ut + 1/2at²

-H = 10 × 11 - 1/2 × 10 × (11)²

= 110 - 5× 121

= 110 - 605

= -495 m

- H = -495 m

hence, H = 495 m

so, height of ballon is 495m when stone is dropped .