If you double the radius, for a fixed angular velocity, the tangential velocity will: a. decrease by halfb. stay the samec. increase by a factor of twod. increase by a factor of four

C. Increase by a factor of two.

Explanation:

Lets take angular speed =

Initially radius = r m

The tangential velocity = v m/s

We know that

If the radius becomes double ,lets say r'

r'= 2 r

Then

The tangential velocity = v' m/s

v' = 2 v

Then we can say that velocity will become double.

Therefore the answer will be C.

C. Increase by a factor of two.

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