Classical physics

Jun 17th, 2015
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1.The diagram below shows a worker using a rope to pull a cart. The worker’s pull on the handle of the cart can best be described as a force having - 1. magnitude, only 2. direction, only 3. both magnitude and direction 4. neither magnitude nor direction

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Newton's Laws of MotionThere was this fellow in England namedSir Isaac Newton. A little bit stuffy, bad hair, but quite an intelligent guy. He worked on developingcalculusandphysicsat the same time. During his work, he came up with the three basic ideas that are applied to the physics of mostmotion(NOTmodern physics). The ideas have been tested and verified so many times over the years, that scientists now call themNewton's Three Laws of Motion.First LawThe first law says that an object atresttends to stay at rest, and an object inmotiontends to stay in motion, with the same direction andspeed. Motion (or lack of motion) cannot change without an unbalancedforceacting. If nothing is happening to you, and nothing does happen, you will never go anywhere. If you're going in a specific direction, unless something happens to you, you will always go in that direction. Forever.You can see good examples of this idea when you see video footage ofastronauts. Have you ever noticed that their tools float? They can just place them in space and they stay in one place. There is no interfering force to cause this situation to change. The same is true when they throw objects for the camera. Those objects move in a straight line. If they threw something when doing a spacewalk, that object would continue moving in the same direction and with the same speed unless interfered with; for example, if a planet'sgravitypulled on it (Note: This is a really really simple way o

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