Question
Physics Question on mechanical properties of fluid
A solid sphere falls with a terminal velocity v in air. If it is allowed to fall in vacuum,
A
terminal velocity of sphere =v
B
terminal velocity of sphere $
C
terminal velocity of sphere >v
D
sphere never attains terminal velocity
Answer
sphere never attains terminal velocity
Explanation
Solution
When a solid sphere falls in vacuum, no viscous force is acting on the sphere and the sphere falls under gravity. Due to which sphere never attains terminal velocity