What will happen if you throw a baseball in the air? What kind of energy will appear?

A flying baseball has at least two types of energy: kinetic, due to speed, and potential, due to height over Earth.

Kinetic energy is equal to `m V^2/2,` where m is the mass and V is the speed. Potential energy is `mgh,` where h is the height and g is the gravity acceleration.

Actually, potential energy may be measured off any level, so only a change of kinetic energy has physical meaning.

If air resistance is negligible (actually not), then the sum of these energies, full energy, is conserved. If we take air resistance into account, we see that the sum of kinetic and potential energy decreases. Some part of the ball energy dissipates into motion of air particles, and some part heats up the ball (transforms into thermal energy).