AP Physics 1: 3.5 Changes and Conservation Laws
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AP Physics 1: 3.5 Changes and Conservation Laws. Which of the following would increase the rate at which the plate spins?
AP Physics 1 | Changes and Conservation Laws |
Language | English Language |
Science Practice 1 | Using representations and models |
Transcript
radius are there is spinning on top of a pole
has shown all right Which of the following would increase
the rate at which the plates spin Select two here
in the aisle All right well let's see we're dealing
with something That's turning huh That must mean we're dealing
with angular momenta ding ding because we're geniuses We know
that angular momentum equals mass times velocity times the objects
radius or we just got a clever too one day
And because we're super geniuses we know that momentum is
conserved whether that's angular momentum or linear momentum So once
forces applied and objects total momentum won't change unless another
force acts on it So if momentum doesn't change we
know that if we want to raise velocity we have
tto lower one of the other variables That means we
can decrease the mass of the plate or decrease the
radius of the plate We'll do it Either it is
or both would mean that the velocity would have to
increase to maintain a total angular momenta So are correct
choices are a and c and looking at our equation
we can see that the length of the pool doesn't
affect angular momentum so be doesn't work and placing a
small way that the edge of the plate would increase
mass was it would throw off the delicate balance of
the plate and well ruin the whole act You don't
even wanna think about Answer date Speaking of super genius
is conservation of momentum is another of isaac newton's contributions
to physics It comes from his laws of motion but
he wasn't much of a place better He wouldn't All 00:01:43.663 --> [endTime] my great no