course phy121
If the velocity of the object changes from 3 cm / sec to 14 cm / sec in 7 seconds, then at what average rate is the velocity changing?Average rate of velocity change is 1.57cm/sec/sec
A cart rolling from rest down a constant incline of length 76 cm requires 7.8 seconds to travel length of the incline.
What is its average velocity?
9.74cm/sec
An object which accelerates uniformly from rest will attain a final velocity which is double its average velocity.
What therefore is the final velocity of this cart?
19.48cm/sec
What average rate is the velocity of the cart therefore changing?
2.5cm/sec/sec
Good.
At what average rate does the velocity of an automobile change, if it accelerates uniformly down a track, starting from rest, and if it requires 11 seconds to cover a distance of 110 meters.
.91m/sec/sec
You need to show the details of your reasoning. Your last answer appears to have been obtained by dividing the average velocity by the change in clock time. This calculation does not result in the average acceleration.
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