|
|
Initial speed of rain drop = 30 m/s
They cover distance equal to their radii which is 1 mm
So, using v2=u2 + 2as, find a which is the deceleration
Force exerted by the head on the drop to stop the drop = mass of drop x a
By newtons third law, force exerted by drop is opposite to this force but magnitude is same.
So, 4 mg x Deceleration (a) will give you the answer. Do the necessary unit conversions.
- Rohil
|
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
152
1
