The average velocity of a particle moving in one dimension has a positive value. Is it possible for the instantaneous velocity to have been negative at any time in the interval? Suppose the particle started at the origin x ! 0. If its average velocity is positive, could the particle ever have been in the #x region of the axis?
Answer to relevant QuestionsIf the average velocity of an object is zero in some time interval, what can you say about the displacement of the object for that intervalIf the velocity of a particle is zero, can its acceleration be nonzero? Explain.A student at the top of a building of height h throws one ball upward with a speed of vi and then throws a second ball downward with the same initial speed, vi. How do the final velocities of the balls compare when they ...Diamond and graphite are both pure carbon. Yet diamond is the hardest natural substance and graphite is one of the softest. Why?Note from Table 2.3 that the most common minerals in the earth’s crust are all silicates. The basic building block is the silicon-oxygen tetrahedron (see Fig. 2.4). What is the net electric charge of the tetrahedron and ...
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