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Introduction to Description of Motion

When we observe our surroundings, we see a lot of things moving. We see vehicles moving on roads, people walking, leaves fluttering, etc. In fact, the entire universe—right from galaxies to electrons—is in constant motion.

Now we have to give a serious thought about these basic questions like what is motion? When do we say a body is moving or at rest? How can we describe the motion of a body? What cause a body to move? Can a body that is moving according to one observer appear to be at rest for a different observer? We can find answers to these questions by studying motion. The branch of physics that deals with the study of motion is called mechanics.


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