Question

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 $<v$
• C. terminal velocity of sphere $>v$
• D. sphere never attains terminal velocity

Answer 1

Answer: (D)

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