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#Post#: 526--------------------------------------------------
Thanksgiving Assignment questions
By: Tom Cruise Date: November 21, 2017, 5:06 pm
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Any Questions you might have with the assignment, post here!!
Here's a quick hint to #1: For work to occur, Force and Motion
MUST be in the same direction (or at least a component of them
in the same direction) or no work is done!
#Post#: 527--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Tom Cruise Date: November 21, 2017, 5:14 pm
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Oh, and #6 is supposed to say "A 15 gram bullet," NOT 15 kg!
That's sort of unrealistic. That said, I set up the answer key
to have an answer for either one, so you can either use 15 or
the more accurate 0.015 kg.
#Post#: 528--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Sabre Date: November 24, 2017, 7:07 pm
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On question number 4, can I set my force applied equal to the
coefficient of kinetic friction?
#Post#: 529--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Tom Cruise Date: November 24, 2017, 7:23 pm
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[quote author=Sabre link=topic=156.msg528#msg528
date=1511572079]
On question number 4, can I set my force applied equal to the
coefficient of kinetic friction?
[/quote]Careful... it says the block is moving at constant
speed. Work also equals the change in KE. If the speed remains
constant, what must be the change in KE? Not meant to be a
trick question, but it is a little
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#Post#: 530--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Titan Date: November 26, 2017, 9:24 pm
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For number 3 wouldn't the angle not matter since work and force
must be going in the same direction?
#Post#: 531--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Tom Cruise Date: November 26, 2017, 9:33 pm
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[quote author=Titan link=topic=156.msg530#msg530
date=1511753094]
For number 3 wouldn't the angle not matter since work and force
must be going in the same direction?
[/quote]A part of the force has to be in the same direction. So
you would use the angle to find out how much of the force is
parallel to the direction of motion and use that.
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#Post#: 532--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Titan Date: November 26, 2017, 10:23 pm
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Then on number 8 part c, would the tension of that block be
proportional to the tension of the other 2 blocks?
#Post#: 533--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Cyclone Date: November 26, 2017, 10:31 pm
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Which questions are extra credit?
#Post#: 534--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Tom Cruise Date: November 26, 2017, 10:54 pm
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[quote author=Titan link=topic=156.msg532#msg532
date=1511756624]
Then on number 8 part c, would the tension of that block be
proportional to the tension of the other 2 blocks?
[/quote]It is. If you understand how the proportion works, it's
a little faster, otherwise you can look at it from the 3rd
blocks point of view, and solve for tension in a force problem.
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#Post#: 535--------------------------------------------------
Re: Thanksgiving Assignment questions
By: Tom Cruise Date: November 26, 2017, 10:54 pm
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[quote author=Cyclone link=topic=156.msg533#msg533
date=1511757079]
Which questions are extra credit?
[/quote]6, 8, and 10
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