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Frequency Pendulum

  • #1

Homework Statement



In a swing cycle (pendulum), it takes a child 3 seconds to go from maximum velocity to minimum velocity. What is the frequency of the child's motion?

A.80 mHz
B.170 mHz
C.330 mHz
D. 3 Hz

Homework Equations



T=1/f



The Attempt at a Solution



This means it takes 3 second to complete half of the cycle, so 6 seconds to complete the entire cycle, and 1/6 cycles then happen per second. So confused. Millihertz???
 

Answers and Replies

  • #2
ehild
Homework Helper
15,406
1,810
mHz is 0.001 Hz.

ehild
 
  • #3
So B
 

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