aamc 11, #43 and 44

[riseNshine]

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I'm having some difficulties with these questions.

For #44, cannot the car technically rotate a full 360?
For #43, why doesn't A work?

Thanks.

 

[riseNshine]

And also for #46, why cannot A (the gravitational pull) be a logical explanation as well?

 

[LoLCareerGoals]

Can you post full questions? Not everyone has your tests or has time to look them up. It is not that hard to post the full problem.
Also one question per thread works best unless questions are related.

 

[CaribbeanBlue]

I'm having some difficulties with these questions.

For #44, cannot the car technically rotate a full 360?
For #43, why doesn't A work?

Thanks.

Could you by chance quote the question?

I am not sure if we can access the questions unless we restart the test... I could be wrong.

 

[riseNshine]

Sure, they're as follows:
43 and 44 deal with a passage on producing an artificial gravitational field using a human centrifuge.I realize it might be hard without the passage but here goes:
43) What causes an object to experience an artificial gravitational acceleration in the rotating space station.
a)earth's gravitational field
b)object's propensity to move in a straight line while the space station forces it into a curved path.
c)space station's mass
d) object's kinetic energy

44)Which of the following constraints applies to the suspension angle.
answer b) between 0 and pi/2

46)At the molecular level, what happens to the supporting pillars as the water levels rise.
a) increasing mass of tank causes greater gravitational pull between tank and molecules in pillars, making them shorter.
or
c)increasing weight of tank pushes molecules closer together along the vertical direction, making pillars shorter

 

[Saint Fu]

43) A doesn't work because the question asks specifically what causes the artificial gravity in the rotating space station. I.e., how is the space station creating its own "gravity"?

44) Theta is NOT the angle of rotation of the centrifuge. In Figure 1, notice how theta is labeled in the side vew. Basically it's asking how far the car can swing out while the whole thing is spinning.

46) In the first place, the gravitational pull is basically nonexistent here. Most of the time, effects due to gravity are negligible unless you're talking about celestial bodies. Second, even if it weren't negligible, I'd argue that gravity would cause the pillars to expand. Anyway, the weight of the tank FAR overshadows any effects due to gravity, so C is the best answer.

 

[dlquan]

44. From experience, when the centrifuge is not moving the angle will be a 90 and at the highest speed, the angle goes closer and closer to 0.