|Jun13-12, 10:44 PM||#1|
Need help on getting the resonant frequency
A 25.0-kg child in Red Deer pumps herself on a swing when she kicks upward on the downswing, thus changing the distance from the pivot point to her centre of gravity from 2.40 m to 2.28 m.
1)The resonant frequency of her swing before the kick is: ___ Hz, and the resonant frequency after the kick is: _____ Hz.
I don't want the answer i just want a hint or a formula i am supposed to use for this, please and thank u. Because my textbook has no examples of it.
|Jun16-12, 01:10 PM||#3|
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