Final answer:
The speed of a foot during a kick determines the kinetic energy involved; a faster kick leads to more energy being transferred to the soccer ball, resulting in the ball being put into motion.
Step-by-step explanation:
The speed of a foot affects its collision with a soccer ball in terms of the energy transferred during the impact. When addressing the question, "How does the speed of a foot affect its collision with a soccer ball?", the correct words to fill in the blanks are as follows: A moving foot has kinetic mechanical energy when it is kicked faster. So, when the faster kick hits the ball, it has more energy that can be transferred to put the ball in motion. This exchange of energy from the foot to the ball applies the concepts of kinetic energy and the conservation of energy, where the energy is not lost but rather converted from one form to another or transferred from one object to another.