Answer:
The baseball's kinetic energy is 120 joules.
Step-by-step explanation:
The kinetic energy is defined as:
(1)
Where
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):


But 1 j =


Hence, baseball's kinetic energy is 120 joules.