(a) Explain how you can use the graph of position versus time in Figure 2.54 to describe the change in velocity over time. Identify (b) the time ( ta , tb , tc , td , or te ) at which the instantaneous velocity is greatest, (c) the time at which it is zero, and (d) the time at which it is negative.

ANSWER:

a)

Step 1:-

The graph indicates the plot of position versus time.

The slope of the curve will give the velocity.

It can be checked that, the graph is not a straight line with some angle. So, the velocity is not changing.

If the graph would have been like a slanted straight line, it denotes uniform velocity.