- #1
lillybeans
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Homework Statement
The following is a physics problem taken directly from my online assignment. As you can see, I only have 6 attempts available in total and I have already exhausted 5/6:
As shown in the diagram, someone is pulling on a HEAVY straight rope with force F. Points A and B are one quarter of the distance from each end, and points O and P are the ends of rope. The rope is attached to a heavy block, which slides on a frictionless floor, and which therefore accelerates as it is pulled.
Select the appropriate choice for each of the following statements: True, False, Greater than, Less than, or Equal to For choices involving comparisons Greater than, Less than or Equal to, consider only the magnitudes of the quantities being compared.
Homework Equations
F=ma
The Attempt at a Solution
To begin with, I am now definitely sure of the following:
1.___
2. Less than
3.___
For 1&3, I think 1 should be false and 3 should be true, because technically you can treat the rope and the box as one object and they are both accelerating/moving at the same rates. However, I'm not sure what the hint "think of each quarter of the rope as a separate mass" is trying to say. Is it implying that if an object is long enough, different parts of the SAME object will move/accelerate at different rates simply due to their position relative to each other? But how can the rope not SNAP if the front of the rope is moving/accelerating at a faster rate than the rear? So if not, I say 1 is false, 2 is less than, 3 is true. Any opinions and help would be greatly appreciated. Too scared to press the submit button right now; it's my last chance left.
And here are the previous attempts, all of which are incorrect (the fourth one was a stupid waste):
True
Greater than
False
False
Equal to
False
True
Equal to
False
Equal to
Equal to
False
False
Less than
False
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