It's great that Molly is investigating the change in motion of an object! By kicking a soccer ball three times with different forces, she can observe how the ball's motion changes in response to different amounts of force.
When Molly kicks the ball with more force, the ball will have a greater acceleration and speed. When she kicks the ball with less force, the ball will have a smaller acceleration and speed.
Molly can use her observations to understand the relationship between force and motion. If she measures the distance the ball travels and the time it takes to travel that distance, she can calculate the ball's speed and acceleration. She can then plot the data on a graph to see how the ball's motion changes with different amounts of force.
This kind of investigation is a great way to learn about the laws of motion and the relationship between force, mass, and acceleration. Keep up the good work, Molly!