phy 201
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The problem:
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: ->->->->->->->->->->->-> :
Balls average velocity would be 7cm/sec
As , average velocity = initial velocity + final velocity/2=4+10/2=7cm/sec.
• Without further information, why is this just a guess?
answer/question/discussion: ->->->->->->->->->->->-> :
Because there could be an uncertainty in calculating the velocity.
• 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: ->->->->->->->->->->->-> :
change in distance = change in velocity / change in time
=10cm/sec-4cm/sec/3sec= 6/3= 2cm/sec^2
You are not using the correct definition here; this is not a distance.
• At what average rate did its velocity change with respect to clock time during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
Average rate of velocity= change distance/ change in time
2cm/3sec=0.66
you did not apply the definition correctly.
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20 minutes
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Solution
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