Key Idea.
Section 1
Patterns Help Predict Motion
Objects often move in regular ways called patterns. For example, a ball on a ramp always rolls down, and a swing always comes back.
By observing these patterns, we can predict future motion. If we know that gravity always pulls down, we can predict that if we drop a pencil, it will fall to the floor.
Section 2
Predicting Changes in Force
We can also predict what will happen if forces change. We know that unbalanced forces cause movement.
Therefore, we can predict that if we push a toy car harder (add more force), it will move faster. If we turn off the magnets on the floating train, we can predict it will fall because gravity will no longer be balanced. Understanding forces helps us guess what happens next.
Expand to review the lesson summary and core properties.
Section 1
Patterns Help Predict Motion
Objects often move in regular ways called patterns. For example, a ball on a ramp always rolls down, and a swing always comes back.
By observing these patterns, we can predict future motion. If we know that gravity always pulls down, we can predict that if we drop a pencil, it will fall to the floor.
Section 2
Predicting Changes in Force
We can also predict what will happen if forces change. We know that unbalanced forces cause movement.
Therefore, we can predict that if we push a toy car harder (add more force), it will move faster. If we turn off the magnets on the floating train, we can predict it will fall because gravity will no longer be balanced. Understanding forces helps us guess what happens next.