Answer:
The baseball's kinetic energy is 120 joules.
Explanation:
The kinetic energy is defined as:
[tex]k_{e} = \frac{1}{2}mv^{2}[/tex] (1)
Where [tex]k_{e}[/tex] is the kinetic energy, m is the mass and v is the velocity.
The kinetic energy represents how much energy have an object as a consequence of its movement.
For the case of a baseball (m = 0.15 kg, v = 40.0 m/s):
[tex]k_{e} = \frac{1}{2}(0.15kg)(40.0m/s)^{2}[/tex]
[tex]k_{e} = 120 Kg.m^{2}/s^{2}[/tex]
But 1 j = [tex]kg.m^{2}/s^{2}[/tex]
[tex]k_{e} = 120 j[/tex]
Hence, baseball's kinetic energy is 120 joules.
