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phy 201
Your 'cq_1_22.2' 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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An airplane traveling to the northwest is exerting just enough force to overcome wind resistance. It encounters a sudden wind gust which is directed at 30 degrees south of east, which results in a net force in that direction.
During the half-second before the pilot has time to react to the gust, does the airplane speed up, slow down or maintain constant (or very nearly-constant) speed?
answer/question/discussion: ->->->->->->->->->->->-> :
30 degrees east
.5 second
the reaction to the gust the airplane should slow down because it air gust is going against the air plane
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Does it veer a bit to the right, a bit to the left or does it continue traveling along a straight line?
answer/question/discussion: ->->->->->->->->->->->-> :
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I think it would very to the right because the air is moving east
A 70 gram ball rolls off the edge of a table and falls freely to the floor 122 cm below. While in free fall it moves 40 cm in the horizontal direction. At the instant it leaves the edge it is moving only in the horizontal direction. In the vertical direction, at this instant it is moving neither up nor down so its vertical velocity is zero. For the interval of free fall:
What are its final velocity in the vertical direction and its average velocity in the horizontal direction?
answer/question/discussion: ->->->->->->->->->->->-> :
Final velocity
70g
122 cm - 40 cm horizontal
dont you need time to solve for velocity?
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@& If you analyze the vertical motion you will get the time of fall.*@
Assuming zero acceleration in the horizontal direction, what are the vertical and horizontal components of its velocity the instant before striking the floor?
answer/question/discussion: ->->->->->->->->->->->-> :
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What are its speed and direction of motion at this instant?
answer/question/discussion: ->->->->->->->->->->->-> :
I think the direction of the motion is south because the ball is falling
how do you solve for speed without time
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What is its kinetic energy at this instant?
answer/question/discussion: ->->->->->->->->->->->-> :
.5 m v^2
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What was its kinetic energy as it left the tabletop?
answer/question/discussion: ->->->->->->->->->->->-> :
There is no KE left ?
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What is the change in its gravitational potential energy from the tabletop to the floor?
answer/question/discussion: ->->->->->->->->->->->-> :
9.8 m/s^2
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@& This is an acceleration, not an energy.*@
How are the the initial KE, the final KE and the change in PE related?
answer/question/discussion: ->->->->->->->->->->->-> : KE and PE are the same?
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How much of the final KE is in the horizontal direction and how much in the vertical?
answer/question/discussion: ->->->->->->->->->->->-> :
not sure how to solve that
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*#&!
@& I believe this last documents was submitted along with another document. I can't easily identify this document. Please submit it once more using the form for that particular cq problem.*@