Question

The fastest speed at table tennis ball has been hit is 21.12 faster than the speed for the fastest swimmer. What is the speed for the table tennis ball

Answer 1

42.66
`s = 21.12 * 2.02\\ = 42.66 m/s` m/s

Explanation:

The fastest swimmer, Caeleb Dressel holds the record of 49.50 for 100m

Taking the distance and time, we can compute the velocity:

`V = (displacemnent)/(time) \\= (100m)/(49.50s)\\= 2.02 m/s`

The velocity (speed) of the fastest swimmer will be 2.02 m/s

A tennis ball will travel at 21. 12 times faster which is:

Answer 2

Remark

You cannot give an answer to this unless you are give the fastest speed of a swimmer. That stat is not an easy one to decide upon. At what distance for example or do you eliminate distance? Since this is a college level question, I don't think it unreasonable that you have to research raw distance over fastest time.

The fastest speed I can find is 100 meters in 46.91 seconds. That means that the actual speed of the swimmer is 100 meters / 46.91 = 2.132 meters / second.

Givens

Set up a proportion with the numbers found and given

Speed of ball / speed of swimmer = 21.12 / 1

Speed of ball = x

Solution

Speed of swimmer = 2.132 m/s

x / 2.132 = 21.12 / 1 Multiply Both sides by 2.132

x = 21.12 * 2.132 / 1

x = 45.02 m/s

Answer

45.02 m/s