Question

A balloon starts rising from the ground with an acceleration of 1.25 ?/?8 after 8?, a stone is released from the balloon. The stone will (? = 10 ?/?8) a) Reach the ground in 4 second b) Begin to move down after begin released c) Have a displacement of 50 ? d) Cover a distance of 40 ? in reaching the ground

anyone give me ans please​

Answer 1

Explanation:

v=1.25∗8m/s=10m/s

s=21∗1.25∗8∗8m/s=40m

now, 40=−10t+21∗10∗t2

or, 5t2−10t−40=0

or,t2−2t−8=0

hence, t=4s

So B is correct.

s=40m.

displacement= 40m.

Just after being released the stone has an upward velocity, so it will move upwards first. So A is wrong.

distance in an upward direction before stopping d.

d=2gv2−u2=2∗10102−02=5m

and distance= s+2d=50m

So the distance covered is 50 m and the displacement is 40 m.