course PHY 201
9/19 12:07 am
What are the average acceleration and final velocity of an object which accelerates uniformly from rest, traveling a distance of 69 cm from start to finish and ending up with a velocity of 18.1 cm/sec?
18.1 cm/sec is the final velocity.
An object with uniform acceleration has a final velocity which is twice the average velocity.
This statement isn't quite true. If you add a phrase it's true:
An object with uniform acceleration which starts from rest has a final velocity which is twice the average velocity.
If the final velocity is 18.1 cm/s, then the average velocity is 9.05 cm/s. With an average velocity of 9.05 cm/s and traveling a distance of 69 cm, this would give a clock time of 7.62 seconds. A= (18.1)/7.62 = 2.38cm/s^2. So the average acceleration is 2.38 cm/s^2
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