Concept explainers
The curve in Fig. 7.24b has a maximum at a point between x2 and x3. Which statement correctly describes what happens to the particle when it is at this point? (i) The particle’s acceleration is zero. (ii) The particle accelerates in the positive x-direction; the magnitude of the acceleration is less than at any other point between x2 and x3. (iii) The particle accelerates in the positive x-direction; the magnitude of the acceleration is greater than at any other point between x2 and x3. (iv) The particle accelerates in the negative x-direction; the magnitude of the acceleration is less than at any other point between x2 and x3. (v) The particle accelerates in the negative x-direction; the magnitude of the acceleration is greater than at any other point between x2 and x3.
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