Phy 121
Your 'cq_1_08.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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A ball is tossed upward with an initial velocity of 25 meters / second. Assume that the acceleration of gravity is 10 m/s^2 downward.
• What will be the velocity of the ball after one second?
answer/question/discussion: ->->->->->->->->->->->-> : 15m/s^2
• What will be its velocity at the end of two seconds?
answer/question/discussion: ->->->->->->->->->->->-> : 5m/s^2
• During the first two seconds, what therefore is its average velocity?
answer/question/discussion: ->->->->->->->->->->->-> : 15m/s^2
• How far does it therefore rise in the first two seconds?
answer/question/discussion: ->->->->->->->->->->->-> : 30m
• What will be its velocity at the end of a additional second, and at the end of one more additional second?
answer/question/discussion: ->->->->->->->->->->->-> : -10m/s^2, -20m/s^2
• At what instant does the ball reach its maximum height, and how high has it risen by that instant?
answer/question/discussion: ->->->->->->->->->->->-> : 2.5seconds, 37.5m
• What is its average velocity for the first four seconds, and how high is it at the end of the fourth second?
answer/question/discussion: ->->->->->->->->->->->-> : -5m/s^2, -20m
• How high will it be at the end of the sixth second?
answer/question/discussion: ->->->->->->->->->->->-> : -30m
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20min
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I was wondering if there was any way to know our grade to this point. I've turned in every assignment to this point shy of a few labs that I need to catch up on.
Your work so far looks good, but it's impossible to estimate a grade until you've taken the Major Quiz. That's coming up soon.
No need to resubmit because you'll understand, but be sure to see the link below.
Please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.