Question
Question: A solid sphere falls with a terminal velocity in air. If it is allowed to fall in vacuum,...
A solid sphere falls with a terminal velocity in air. If it is allowed to fall in vacuum,
A
Terminal velocity of sphere = v
B
Terminal velocity of sphere < v
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.