Question

plzz solve Q 3
......class 9th...

Answer 1

Let's use the conservation of energy to find its kinetic energy right before it hits the ground

Ui+Ki=Uf+Kf
Ui=Kf
mgh=Kf
g=10, h=10
100m=Kf

So now it's reduced by 40%

60m=K=mgh
60=gh
6=h...Ans✔