Phy 121
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A ball accelerates at 8 cm/s/s for 3 seconds, starting with velocity 12 cm/s.
• What will be its velocity after the 3 seconds has elapsed?
answer/question/discussion: ->->->->->->->->->->->-> :
The velocity after 3 additional seconds will be 36 cm/s^2 because it is gaining 8cm/s every second in terms of velocity.
• Assuming that acceleration is constant, what will be its average velocity during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
12 – 20 – 28 – 36
The average would be 24 cm/s as this is the midpoint of the two endpoints. This is only true because the acceleration is constant.
• How far will it travel during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
It will travel 72 cm in the 3 second time frame
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10 min
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&#Very good responses. Let me know if you have questions. &#