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?

Respuesta :

Answer:

Kinetic energy of the ball, E = 140.04 Joules

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 :

[tex]E=\dfrac{1}{2}\times m\times v^2[/tex]

[tex]E=\dfrac{1}{2}\times 0.146\times (43.80)^2[/tex]

E = 140.04 J

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