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Now, since we have our distance and our time, we can use the equation to find the answer. The equation to find how fast you throw a baseball without using a radar gun is: Distance / Time = Speed Now since we are trying to calculate how fast we throw a baseball, we usually use mph.sing the formula above D/T=S .0106 / .000116 = 91.379 mph So, to calculate how fast you throw a baseball in mph without using a radar gun, this is the formula you should use.
The more momentum the ball has, the more it will push back your hand as it transfers its momentum to you. Imagine two baseballs are being thrown at you. One is traveling at 50 mph, and the other at 150 mph. Even if you somehow catch that 150 mph ball, it might knock you off your feet.