Newton's First Law shows that this ball is sitting there until she kicks it in the air and the gravity brings it up.
Using Newtons Third Law of Motion, there is a differnt mass of each ball. The soccer ball is heavier, when it drops it will weigh down more but have a bigger bounce.
With the baseball its lighter, so it will bounce lower than the soccer ball even though it weighs less.
The third law states that for every action (force) in nature there is an equal and opposite reaction. This shows the force of the engine and the air pushing against each other, that equals a whole push of force.