Q. 38

# A raindrop of mass 1.00 g falling from a height of 1 km hits the ground with a speed of 50 m s–1. Calculate(a) the loss of P.E. of the drop.(b) the gain in K.E. of the drop.(c) Is the gain in K.E. equal to loss of P.E.? If not why.Take g = 10 m s-2

Answer :

Mass m of drop = 1g = 0.001 kg

Change in height Δ h = 1 km = 1000 m

Final velocity = 50

the drop starts from rest, initial velocity = 0

initial K.E = 0 J

And final K.E =

a) Loss in P.E. =

b) Gain in K.E.

c) No, the gain in K.E. equal to loss of P.E. is not the same because of resistance like drag and viscous force against the drop.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Inelastic collisions in 1 D44 mins
Check Your progress Part 2| Interactive Quiz: Work, Energy & Power44 mins
Work, Energy & Power (Lecture 5)54 mins
Work, Energy & Power (Lecture 6)41 mins
Work, Energy & Power (Lecture 4)50 mins
More About Collisions49 mins
Elastic collisions in 1 D50 mins
Work, Energy & Power (Lecture 2)44 mins
Work, Energy & Power (Lecture 3)47 mins
Work, Energy & Power (Lecture 1)59 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses