Question
Physics Question on Relative Velocity
A rain drop of radius 0.3 mm has a terminal velocity in air 1 ms-1. The viscosity of air is 18×10−5 poise. Find the viscous force on the rain drops.
A
2.05×10−7 N
B
1.018×10−7 N
C
1.05×10−7 N
D
2.058×10−7 N
Answer
1.018×10−7 N
Explanation
Solution
The correct option is (B): 1.018×10−7 N.