A solid sphere falls with a terminal velocity `V` in `CO_(2)` gas. If its is allowed to fall in vacuum

Options

A. Terminal velocity of sphere = v
B. Terminal velocity of sphere lt v
C. Terminal velocity of sphere gt v
D. Sphere never attains terminal velocity

Answer

D

Explanation

The termina velocity of the sphere
`v=2/9 (r^2(rho-sigma)g)/(eta)`
`therefore v=0 " " (therefore` in vaccum g = 0)
Hence , the sphere never attains terminal velocity in vaccum