Answer;
-Potential energy; kinetic energy
When a pitcher is holding a baseball, the ball has potential energy. After the pitcher throws the ball, the ball has kinetic energy.
Step-by-step explanation;
-Energy is the ability to do work. Objects can have stored, or potential, energy when work has been done or by virtue of their position. Potential energy changes to kinetic energy when the object moves. Examples include holding a stretched spring (potential energy) and then releasing it (kinetic energy) or holding a box above the ground (potential energy) and then dropping it (kinetic energy).
-Kinetic energy is a form of energy that results from an object's motion. The measurement of kinetic energy in an object is calculated based on the object's mass and velocity. It is measured in Joules.
-Potential energy is a form of energy that results from an object's position or arrangement of parts. It is stored energy that can become kinetic energy.