# Problem: A baseball weighs 5.13 oz. What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 95.0 mi/ h?By what factor will the kinetic energy change if the speed of the baseball is decreased to 67.2 mi/h?

###### FREE Expert Solution

Kinetic energy:

$\mathbf{KE}\mathbf{=}\frac{\mathbf{1}}{\mathbf{2}}{\mathbf{mv}}^{\mathbf{2}}$

v1 = 95 mi/h

v2 = 67.2 mi/h

mass remains the same: compare the factor v2 in the equation:

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###### Problem Details

A baseball weighs 5.13 oz. What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 95.0 mi/ h?

By what factor will the kinetic energy change if the speed of the baseball is decreased to 67.2 mi/h?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Kinetic & Potential Energy concept. You can view video lessons to learn Kinetic & Potential Energy. Or if you need more Kinetic & Potential Energy practice, you can also practice Kinetic & Potential Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ervin's class at UNR.