3.2.1.P6
The figure at the right represents the position vs. clock reading of the motion of two balls, A and B, moving on parallel tracks. Carefully sketch the figure on your homework paper and answer the following questions:
- Mark with the symbol ta along the t-axis any instant or instants at which one ball is passing the other.
- Which ball is moving faster at clock reading tb?
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- Mark with the symbol tc along the t-axis any instant or instants at which the balls have the same velocity.
- Over the period of time shown in the diagram, which of the following is true of ball B? Explain your answer.
- It is speeding up all the time.
- It is slowing down all the time.
- It is speeding up part of the time and slowing down part of the time.
*From A. Arons, A Guide to Introductory Physics Teaching (John Wiley, 1990).
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