phy 121
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The problem:
A ball accelerates at 8 cm/s^2 for 3 seconds, starting with velocity 12 cm/s.
• What will be its velocity after the 3 seconds has elapsed?
answer/question/discussion: ->->->->->->->->->->->-> :
aAve = `dv / `dt
8 cm/s = x / 3s
8 cm/s * 3s = x
X = 24 cm
The velocity will be 24cm/s
Assuming that acceleration is constant, what will be its average velocity during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : The average velocity will be 18cm/s (24 + 12 = 36/2 = 18).
• How far will it travel during this interval?
answer/question/discussion: ->->->->->->->->->->->-> : 12 cm
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10 min
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Solution
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