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A copper ball of radius r travels with a...

A copper ball of radius `r` travels with a uniform speed v in a viscous fluid if the ball is changed with another ball of radius 2r then new uniform speed will be

A

8v

B

2v

C

4v

D

v

Text Solution

Verified by Experts

The correct Answer is:
B
The ball falls in the viscous fluid with the terminal velocity (v) and `vprop"(radius)"^2 " or "vpropr^2`
`:.` If the radius is doubled or if it is 2r, then the terminal or uniform velocity will be 4 times or 4w.
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