thedesertmouse (thedesertmouse) wrote,

"Kids" say the darnedest things.

"What's the lowest speed the bucket can have at the top of its rotation so that the water does not fall out?" the test question asks, and the student (3 of them so far) do the derivation correctly: it's the square root of the product of the circle radius and the acceleration due to gravity.

But then part b asks "how does the answer depend on mass?" and each of the silly trio gives me a talk argument, which is a polite way of saying 'bullshit', explaining how we must spin the bucket faster if the bucket or water or bucket and water has a higher mass.

Where is "m" in the answer to part a? And who screwed up these students' minds so that when the question asks "what is the mass dependence" they have to act like weasels instead of just saying "there isn't any!"

It's a good thing I don't give negative points for answers that smell bad.
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