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Newton’s second law of motion is basically about how a force acts on mass. Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) means the greater the amount of force needed to accelerate the object. This basically means that heavier objects require more force to go the same distance than a lighter object would. You can see this law in action with the video above.
Newton’s first law is an object at rest will stay at rest, unless it is acted on by an unbalanced force. Also an object in motion continues in motion with the same speed and in the same speed, and in the same direction unless acted on by an unblanced force. This means that there is a natural tendency of objects to keep on doing what they are doing. All objects resist changes in their state of motion. When there is not an unbalanced force, an object in motion will maintain this state of motion. An example of Newton's first law is a car driving at a constant speed and hitting a wall and the driver flies out. This law is sometimes referred to as the “seatbelt law”. You can see this law in action with the video above.
Newton’s third law is For every single action, there is an equal and opposite reaction. This means that for every force there is a force that is equal in size, but opposite in direction. That is like saying that when there is an object that pushes another object, it will get pushed back in the opposite direction equally as hard. You can see this law in action with the video above.
Momentum is the force of a object in motion. Therefore, if you increase the speed or mass of an object, the momentum will increase with it. Momentum explains why it is harder to stop a car going 120 mph than a car going 20 mph. It also explains why it is harder to stop a train going 40 mph than a car going 40 mph.
Conservation of momentum is a law that involves Newton's third law. This law states that momentium will transfer from one object to another in the event of a collision. An example is two cars crashing into each other. One of them is a Semi Truck, and the other is a Mini Cooper. Since the truck is larger, and is going the same speed, it has more momentum than the Mini Cooper. When the two collide, the momentum of the truck is transfered to the Mini Cooper. Therefore, the Mini Cooper will move back after the collision because the truck's momentum was transfered to the Mini Cooper. Its easy. . . . . . . right?
Copyright 2009 Alec Zeitler & Max Griffin, Lighthouse Point Productions, and Air Cannon Studios
