physics chapter 7 revolution shit

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10 Terms

1
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rev/min

rev/min (2pi/1rev)(1min/60s)= rad/s

multiply by 2pi and divide by 60

2
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rad/s

rad/s(1 rev/ 2pi)= rev/s

  • divide rad/s by 2pi to get rev/s

3
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at=α(r)

tangental aceleration= linear acceleration (radius)

4
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v=(2πr)/t

velocity= 2pi(aka 1 rotation) (radius)/time

5
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ac=ω2(r)

centripetal acceleration = angular velocity2(radius)

6
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ac=v2/r

centripetal acceleration= velocity2/radius

7
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24 hours

86400 seconds

8
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T=Iα

torque= inertia (angular acceleration)

9
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r=∆θ/2pi

revolution= angular displacement/ 2 pi

10
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earth’s radius

6.371×106m