cq_1_081

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. &#