Question

A baseball weighing 0.324 lbs is thrown at 98 mph and hits a batter in the upper arm. What is the kinetic energy of the baseball at the moment before impact in Joules?

Answer 1

Kinetic energy of the ball, E = 140.04 Joules

Step-by-step explanation:

It is given that,

Mass of the baseball, m = 0.324 lbs = 0.146 kg

Speed of the baseball, v = 98 mph = 43.80 m/s

We need to find its kinetic energy at the moment before impact. Kinetic energy is given by :

`E=(1)/(2)* m* v^2`

`E=(1)/(2)* 0.146* (43.80)^2`

E = 140.04 J

So, the kinetic energy of the baseball is 140.04 Joules. Hence, this is the required solution.