Newton's Three Laws
Sir Isaac Newton's Three Laws of Motion
Isaac Newton - The Discoverer of the Laws of Motion
Sir Isaac Newton was the scientist that discovered the three laws of motion. This infographic will go over Newton's three laws of motion.
Newton's First Law of Motion
In one word, the first law of motion can be called the law of inertia. This law states that if an object is still, it will stay still, and if an object is moving, it will stay moving in with the same speed and direction, unless a force greater than that object acts on it. In the visual, the ball starts to move when the force (the big black arrow) pushes it. The ball keeps on moving in the path of the small black arrows until it hits the cube, which is the unbalanced force. It bounces of the cube and moves a little bit in the opposite direction (small red arrow). Also, if you try to roll a ball up a hill, gravity will apply a force on the ball, making the ball eventually roll back down the hill.
Newton's Second Law of Motion
This law can be called the law of acceleration. It states that the harder you push on an object, the farther it will go. The more mass it has, the more force you will have to apply. As you can see in the pictures, the empty grocery cart is easier to push. But when it is full of things, I have to apply more force to it to move it at the same speed as the empty cart.
Newton's Third Law of Motion
In two words, Newton's third law can be called the law of action-reaction. This law says that when any force is applied, a force is put back on it that is the different in direction, but yet same in size. For example, a person throws a ball at the wall (the applied force). When it hits the wall, the wall applies a force back. The reapplied force is the same in size, but different in direction, as it moves back towards the person.