Phy201
Your 'cq_1_8.1' 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?
15m/s
What will be its velocity at the end of two seconds?
5m/s
During the first two seconds, what therefore is its average velocity?
15m/s
How far does it therefore rise in the first two seconds?
30m
What will be its velocity at the end of a additional second, and at the end of one more additional second?
-5m/s, -15m/s
At what instant does the ball reach its maximum height, and how high has it risen by that instant?
2.5s ,31.25m
What is its average velocity for the first four seconds, and how high is it at the end of the fourth second?
7.5m/s, 11.25s
Assuming your last answer is 11.25 m rather than 11.25 s, it is not consistent with your first answer. Averaging 7.5 m/s for 4 s results in a displacement of 30 m.
How high will it be at the end of the sixth second?
After 6s the ball would be past the initial staring point
There is no assumption related to how far above the ground the starting point might be, so certainly the ball has passed the starting point. It is still possible to answer the question, assuming uniform acceleration.
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20min
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It is unlikely you would have gotten the correct answers you did not going through appropriate steps. However the steps should be shown. The question is not with you got the right answer but whether you are using the reasoning process that will continue to generate correct results, and upon which you can build further understanding.
Your answers were not all correct, though most were.
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