Abaseball weighs 5.19 oz. what is the kinetic energy, in joules, of this baseball when it is thrown by a major-league pitcher at 96.0 mi/h? by what factor will the kinetic energy change if the speed of the baseball is decreased to 55 mi/h

Part a)

Part b)

Factor by which KE is changed is f = 0.33

Explanation:

As we know that kinetic energy of the ball is given as

in order to find kinetic energy in Joule unit we need to plug in all data in SI units

so here we have

now the speed of the ball is

so we will have

Now if the speed of the ball is 55 mph

so it is

so new kinetic energy is given as

So the factor by which KE is changed is given as

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