soupastupid
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Block Slides Down Giant Globe in Italy
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4 replies · 3K views
No, the globe doesn't have any significant gravity of it's own. Just use the Earth's gravity.
soupastupid
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and so it is a and c
becuz
once the block leaves the globe
nothing is pushing the box up (but friction) and nothing is slowing the box down in the horizontal direction (but friction)
and so the only force is the earth?
right?
becuz
once the block leaves the globe
nothing is pushing the box up (but friction) and nothing is slowing the box down in the horizontal direction (but friction)
and so the only force is the earth?
right?
Yes, the only force is the Earth's gravity. (So no friction.)
soupastupid
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ok the next questions asks about about momentum
im thinking
centripetal acceleration cannot be zero becuz
is it zero? i don't think so becuz its traveling on a circular path prior to leaving the globe
normal force must be zero becuz nothing is pushing up
the net acceleration is down and its velocity is going right and down
the kinetic energy cannot equal its potential energy becuz you cannot tell if the box is halfway down the globe right?
so the only choice is normal force right?
B
im thinking
centripetal acceleration cannot be zero becuz
is it zero? i don't think so becuz its traveling on a circular path prior to leaving the globe
normal force must be zero becuz nothing is pushing up
the net acceleration is down and its velocity is going right and down
the kinetic energy cannot equal its potential energy becuz you cannot tell if the box is halfway down the globe right?
so the only choice is normal force right?
B
