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An ant crawls along the radius from the center to the edge of a circular disk of radius 1 meter, moving at a constant rate of 1 cm/sec. Meanwhile, the disk is turning counterclockwise about its center at 1 revolution per second

User Brigadier
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1 Answer

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Nice, I don't see the question . But I'll assume you want to work out how many revolutions the disk does before the ant reaches the edge of the disc, so I'll work that out.

1 cm/s = 0.01 m/s

s = vt

where s is the distance travelled, v is the speed, and t is the time elapsed.

rearrange for t:

t = s/v

t = 1/0.01
t = 100s (time it takes for ant to reach edge)

1 rev/s • 100 = 100 revolutions, that is the answer.
User Mattmcmanus
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