Giancoli Solutions on Video

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The videos were extremely helpful. You can play them over and over and pause them to review. The narrator explained the steps beautifully and provided details on performing the algebraic manipulations. Different colored pens made it easy to differentiate steps. My Physics teacher often moved through the material very fast in class. The videos allowed me to review areas I found difficult as many times as I needed. Giancoli Answers was a wonderful learning tool for understanding Physics.

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  • 1,930 video solutions for all regular problems in Giancoli's 7th Edition and 1,630 solutions for most regular problems in the 6th Edition.
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Sample solution

Giancoli 7th Edition, Chapter 4, Problem 62


Recent questions and answers

Hi joeotilio25, to explain why $f^2 = \dfrac{1}{T^2}$, first you need to notice that $f = \dfrac{1}{T}$. Period and frequency are reciprocals of each other, which you can also tell by their units. The units of frequency are "Hz", but "Hz" means "cycles / second". The word cycles is not really a unit, so Hz is essentially "1 / seconds", which is the reciprocal of period which has units of seconds. So, since $f = \dfrac{1}{T}$, when you square both sides you get $f^2 = \dfrac{1}{T^2}$. Squaring both sides was useful for substituting into the centripetal acceleration formula, as shown in the video.

All the best,
Mr. Dychko

nevermind, i made a mistake

I believe the velocity is 10^6, not 10^7


Why f^2=1/t^2 is because the periods is squared