Law Number 1: Objects in motion tend to stay in motion and objects at rest tend to stay at rest unless acted upon by an external force. This means that if something is moving, it will stay moving unless a force stops it.
Law Number 2: Force = mass x acceleration (the more mass something has, the more force you need to move it). This means that pushing or pulling something light is easier than pushing or pulling something heavy.
Law Number 3: For every action, there is an equal and opposite reaction. Forces can either be balanced or unbalanced. If the force is balanced, then moving objects remain moving with the same speed and direction and unmoving objects remain staying still.
If two forces of 50 N (newtons) were acting upon the same object in different directions, the forces would be balanced. If two forces were acting upon the same object in opposite directions, one 50 N and the other 100 N, the forces would be unbalanced, and the moving object would change speed or direction, and an unmoving object would start to move.
S&EP: SP2 Using Models
I used models to understand more about Newton's laws of motion by using this simulator to experience more. The simulator helped me understand Newton's laws better, especially his second law. By placing the heavier items in front of the man, I saw that he had to use lots more force to push it. This simulator helped me understand and see how the laws worked in real life.
XCC: Cause and Effect
Newton's laws of motion sort of display a cause and effect relationship. His first law states that moving things stay moving unless a force stops them. The force is the cause and the object stopping is the effect. The second law states that the heavier something is, the more force you need to move it. Something being heavier is the cause and you using more force is the effect. The third law states that every action has an equal and opposite reaction. If you throw a ball, the throw is the cause and it bouncing up again is the effect.
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