I need help with 11 and 13. Please show work for 11. A woman jogs from one end t

Question

I need help with 11 and 13. Please show work for 11.

A woman jogs from one end to the other of a straight 300 m track in 2 min 30 s and then jogs back to the starting point in 3 min 20 s. What was her average speed (a) in jogging to the far end of the track and (b) in coming back to the starting point? For the entire jog, what was her (c) average speed and (d) average velocity? Calculate all quantities to three significant figures. First, indicate for each of the following scenarios whether it is possible or impossible for an object at some moment to have a velocity v and an acceleration a as indicated. Next, mark for each possible scenario (and those in which v and a are nonzero) whether the object is speeding up or slowing down.

Explanation / Answer

11)

2.00

1.50

1.71

0.00

13)

All are possible

possible & speeding up

possible & not applicable

possible & slowing down

possible & not applicable

possible & not applicable

possible & not applicable

possible & slowing down

possible & not applicable

possible & speeding up

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