If you kick it harder, more force, the ball speeds up more in the same direction. So, the change in speed is directly related to the size of the force. More force gives more acceleration and less force gives less acceleration. Example 2 - If you kick a soccer ball and a bowling ball with the same amount of force, the less massive soccer ball will speed up more, and the more massive bowling ball will experience less acceleration. So, the change in speed is inversely related to the ball's mass.
More mass gives less acceleration and less mass gives more acceleration.
Example 1 - As you walk across the floor, your feet exert a force on the floor and the floor exerts an equal and opposite force on your foot pushing you forward. Example 2 - This law of motion drives rocket propulsion. As hot gases are pushed out the bottom of a rocket, the gases push upward on the rocket with the same force, accelerating the rocket so that it can escape the Earth's gravitational field. Example 3 - If two people of roughly equal mass stand next to each other on an ice skating rink, when one person pushes the other both skaters will move. The skater who pushes exerts a force to the right on the second skater but the second skater doesn't have to actively push the other.