Question
Physics Question on speed and velocity
A small sphere of radius ‘r’ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
A
r3
B
r5
C
r2
D
r4
Answer
r5
Explanation
Solution
The correct option is (B): r5