- #1
vanitymdl
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A electric model train travels at 31.7 cm/s around a circular track of radius 1.73 m. How many revolutions does it perform per second, i.e, what is the motion\'s frequency?
______ Rev / s
Find the train\'s period of revolution.
______ s
This is how I worked out the problem:
v^2/r = rw^2
.317^2/1.73 = 1.73w^2
.317^2/1.73^2 = w^2
w = 0.18323699421 radians per second.
there are 2 pi radians, so it takes 2pi radians / .1832 radians/second = seconds
34.3 seconds
1.75 revolutions per second (60/34.3)
I'm getting that 1.75 rev/s is wrong and I don't know why or how
______ Rev / s
Find the train\'s period of revolution.
______ s
This is how I worked out the problem:
v^2/r = rw^2
.317^2/1.73 = 1.73w^2
.317^2/1.73^2 = w^2
w = 0.18323699421 radians per second.
there are 2 pi radians, so it takes 2pi radians / .1832 radians/second = seconds
34.3 seconds
1.75 revolutions per second (60/34.3)
I'm getting that 1.75 rev/s is wrong and I don't know why or how