Phy 121
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A ball starts with velocity 4 cm/sec and ends with a velocity of 10 cm/sec.
What is your best guess about the ball's average velocity?
->->->->->->->->->->->-> answer/question/discussion: 7cm/sec, I added the two velocities and divided by two to get an average.
Without further information, why is this just a guess?
->->->->->->->->->->->-> answer/question/discussion: I do not know for 100% certainty that the rules of velocity allow me to use an algebraic method such as adding then dividing.
If it takes 3 seconds to get from the first velocity to the second, then what is your best guess about how far it traveled during that time?
->->->->->->->->->->->-> answer/question/discussion: 24cm, I divided the 6cm/sec of change in velocity into 3 equal parts (2) and added that to 4 then to 6 then to 8 and combined these number to get 24.
At what average rate did its velocity change with respect to clock time during this interval?
->->->->->->->->->->->-> answer/question/discussion: 2cm/second, six seconds of change / 3 seconds.
`er11
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15minutes
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Solution
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