Question

A rain drop of mass m 1g is falling from a height of 1km hits the ground with a speed of 50m/s

calculate

(a) The loss of potential energy of the drop.

(b) The gain in kinetic energy of the drop.​

Answer 1

Here , m=1g=10−3kg

h=1km=1000m

g=10ms−2v=50ms−1

Loss of potential energy of the drop

=mgh=(103kg)(10ms−2)(1000m)=10J (i)

Hence, option (a) is correct.

Gain in kinetic energy of the drop

=12mv2=12×(10−3kg)(50ms−1)2=1.25J (ii)

Answer 2

Answer:

the loss of potential energy of the drop

Explanation:

a rain of masd 1g is falling from a height of the loss of pontial energy of the drop