The diameter of Ballll A is twice of that of B. What will be the ratio of their terminal velicities in water.

Explanation

To find the ratio of the terminal velocities of two balls A and B, where the diameter of ball A is twice that of ball B, we can follow these steps:

### Step 1: Understand the relationship between diameter and radius
The diameter (d) of a sphere is related to its radius (r) by the formula:
\[ r = \frac{d}{2} \]
Given that the diameter of ball A (d1) is twice the diameter of ball B (d2), we can express the radii as:
\[ r1 = \frac{d1}{2} = \frac{2d2}{2} = d2 \]
Thus, the radius of ball A is equal to the diameter of ball B.
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