By Justin Kruetzkamp
Newton's Law of Motion
Isaac Newton came up with three basic laws of motion.
Newton’s first law of motion says that an object in motion tends to stay in motion unless another force acts on this. For example, if you throw a rock in space, it will keep going at that same speed and direction until another object effects it. On Earth, objects are stopped due to gravity and friction.
Newton’s second law of motion tells us that an object's net force (overall force acting on an object) is proportional to the direction of the force and the mass of the object. This explains why it is harder to move an object with more mass. For example, a bus and a sedan are driving together at the same speed. They have the same velocity, however the bus has more momentum due to its larger mass.
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