Question

The water at the foot of the fall will be at a different temperature from that at the top.

(a) True

(b) False

I have been asked this question at a job interview.

The question is from Conservation of Energy in section Laws of Motion of Engineering Physics I

Answer 1

Correct answer is (a) True

The explanation: When water falls from a height, its potential energy is converted into kinetic energy and its velocity is maximum at the foot of the fall. The velocity is suddenly reduced to zero, and hence its kinetic energy gets converted into heat energy raising its temperature.