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Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Global Edition
7
Linear Momentum
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7-1 and 7-2: Momentum and its Conservation
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7-3: Collisions and Impulse
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7-4 and 7-5: Elastic Collisions
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7-6: Inelastic Collisions
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7-7: Collisions in Two Dimensions
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7-8: Center of Mass (CM)
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7-9: CM for the Human Body
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7-10: CM and Translational Motion
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Problem 24
A
  1. 410 kg m/s410\textrm{ kg m/s}
  2. 1.5×105 N1.5\times 10^5\textrm{ N}
  3. 4000 N4000\textrm{ N}
Giancoli 7th "Global" Edition, Chapter 7, Problem 24 solution video poster
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COMMENTS
By padmanabha.banerjee on Sun, 10/25/2020 - 3:44 AM

For the Fup calcs for part (b) and (c) at the last, the first term inside the bracket, that's the acceleration due to gravity, shouldn't it be taken as -9.8m/s2?! (based on the positive y direction considers as upwards)..... the answer to part (B) still remains the same, but the answer to part (c) comes as 2479.4N... please guide.... Thanks so much!...

By Mr. Dychko on Thu, 12/3/2020 - 10:58 PM

Hello, thank you for the question. The factor gg is meant to be the magnitude of the acceleration due to gravity, which means normally substituting 9.8 m/s29.8\textrm{ m/s}^2 for it. The negative, to indicate the downward direction, is already accounted for in the net force formula when there is a minus in front of the FgF_g term.
Hope this helps,
Shaun

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