Isaac Newton is often credited with discovering and naming the three laws of motion, namely, the law of gravity, the law of conservation of energy, and the law of conservation of momentum. Although Isaac Newton did make significant contributions to these laws, most people believe that it is Galileo Galilei who first devised and presented them in detail.
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In his work, Galileo presents a chart of the motions of all objects over any length of time. He names each one of them and states the amount of force required for each to move in that way. After he has completed this chart, Galileo notes the time and place where all the objects were at any given time. Galileo then compares all the different speeds for each object along with their distances from the Earth.
According to the law of conservation of energy, which Einstein developed a short while after Galileo, any motion of an object is equal to the energy that was used up in its motion. The amount of energy is equal to the mass times the speed of the body. According to the second law of motion, the energy of an object will always remain the same, no matter what the initial velocity, or acceleration, of the object.
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According to the law of conservation of momentum, the momentum of any object can be converted into an energy if that energy is added to or taken away from the object. Again, according to this law, the energy of an object can be altered in any direction, no matter what the initial velocity or speed of the object may have been.
The third law of motion that these three laws of motion worksheet answers is the law of gravity. The law of gravity states that the weight of an object on the earth is directly proportional to the distance from the center of that weight to the center of the earth. According to this law, any object moving towards the Earth will move closer to the center, and any object moving away from the Earth will move farther from the center.
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James Stewart, an English mathematician, came up with the first version of the law of gravity. The first version, according to this law, states that the gravitational force of an object is equal to the force that is exerted by the earth on a uniformly distributed mass, such as a bowling ball.
According to the second law of motion, when two bodies are at rest, they are neither attracting nor repelling each other. According to this second law of motion, so when the center of the mass of both objects is at rest, the centers of both objects must also be at rest. According to the third law of motion, the distance from the center of the two objects to the center of the Earth is not changed when either of the two objects is accelerated in a downward direction.
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When the law of motion is applied to a spinning object, the speed of the object is less in the direction of spin than the speed of the motion. If you know the spin of the object, the velocity of the object is also less in that direction. The more spin, the less speed.
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