Giancoli Solutions on Video

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• 1,930 video solutions for all regular problems in Giancoli's 7th Edition and 1,681 solutions for most regular problems in the 6th Edition.
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Sample solution

Giancoli 7th Edition, Chapter 4, Problem 62

(1:36)

Recent questions and answers

Giancoli 7th Edition, Chapter 6, Problem 10

Hi msjmai, thanks for the comment. Since the coordinate system is defined as positive down the ramp, whereas the applied force is up the ramp, this makes the applied force is in the negative direction. The screenshot for the video shows +1600N at the particular moment the screenshot was taken, but at 1:16 in the video I mention that it should actually be negative.

Cheers,
Mr. Dychko

Giancoli 6th Edition, Chapter 7, Problem 32

Thank you that helped me a lot :)

Giancoli 7th Edition, Chapter 6, Problem 10

The answer at the top of the page says -1600N and I believe it should be a positive number (+1600N).

Giancoli 7th Edition, Chapter 3, Problem 18

Hi hockey11, thanks for your question. The answer is definitely $7.5 \textrm{ m}$, as shown, and not $14.1 \textrm{ m}$. I think the equation you're looking at is $\dfrac{1}{2} \times 9.8 \textrm{ m/s}^2 \times (3.0 \textrm{ s})^2$, is that right? It's correct that the $\textrm{s}^2$ units cancel, as you say. However, the numbers do not cancel. This means the calculation is $\dfrac{1}{2} \times 9.8 \times (3.0)^2$ with units of $\textrm{m}$ since the $\textrm{s}^2$ units cancel.

I hope this helps,
Mr. Dychko