Question

A solid sphere falls with a terminal velocity of $20m/s$ in air. If it is allowed to fall in vacuum?

• A. the terminal velocity will be 20 m/s
• B. the terminal velocity will be less than 20 m/s
• C. the terminal velocity will be more than 20 m/s
• D. there will be no terminal velocity

Answer 1

Answer: (D)

As in vacuum, there is no viscosity, no resistive force and hence no terminal velocity can be acquired.