Question

A baseball pitcher throws a 142.5g baseball with a speed of 39.2 m/s. What is the mechanical kinetic energy? I solved it and got 109.4856 J

If the pitcher throws the ball straight up, how high would it go before it stopped and came back down?

Answer 1

Explanation:

It is given that,

Mass of baseball is 142.5 g

Speed of the baseball is 39.2 m/s

The kinetic energy of the baseball is given by the formula as follows :

$K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 142.5\times 10^{-3}\times (39.2)^2\\\\K=109.48\ J$

Let h is the maximum height reached by the baseball. Using conservation of energy height is given by :

$h=\dfrac{u^2}{2g}\\\\h=\dfrac{(39.2)^2}{2\times 9.8}\\\\h=78.4\ m$

Learn more,

Conservation of energy

https://brainly.in/question/17007423