cq_1_072

Phy 201

Your 'cq_1_07.2' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.

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An automobile rolls 10 meters down a constant incline with slope .05 in 8 seconds, starting from rest. The same automobile requires 5 seconds to roll the same distance down an incline with slope .10, again starting from rest.

• At what average rate is the automobile's acceleration changing with respect to the slope of the incline?

answer/question/discussion: ->->->->->->->->->->->-> :

Situation A

vAve = 10 m / 8 s

vAve = 1.25 m/s

vf = 1.25 m/s

v0 is zero so vf cannot be the same as vAve

aAve = 1.25 m/s / 8 s

aAve = .156 m/s/s

Situation B

vAve = 10 m / 5 s

vAve = 2 m/s

vf = 2 m/s

aAve = 2 m/s / 5 s

aAve = .4 m/s/s

(.156 m/s/s + .4 m/s/s) / 2 = .278 m/s/s

This is the average of your two acceleration values, not the requested rate.

#$&*

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10 minutes

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Solution

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