Hailstones fall from a certain height. If they melt completely on reaching the ground, find the height from which they fall.

Hailstones fall from a certain height. If they melt completely on reac

1.	Hailstones fall from a certain height. If they melt completely on reaching the ground, find the height from which they fall.
Answer» Solution :On reaching the ground, a hailstone of mass M loses potential ENERGY which is converted into a heat energy required to melt it. In SI, potential energy lost = heat energy required for melting the hailstone MGH `=ML rArr gh = L ` ` H = L/g , h = (80xx4.2 xx1000)/10` ` = 33.6 xx1000 m = 33.6 km `