Why Does My Force Calculation Differ From the Book?

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SUMMARY

The discussion centers on a force calculation discrepancy between a user's result and a textbook answer. The user calculated F_1 using the formula F_1 = (A_1/A_2) * F_2, substituting A_1 = 1.5 in, A_2 = 21 in, and F_2 = 4000 lbs, resulting in F_1 = 280 lbs. The user confidently asserts that their calculation is correct and attributes the error to the textbook rather than their method. The key takeaway is the correct application of the formula for force based on area ratios.

PREREQUISITES
  • Understanding of basic physics concepts, specifically force and area relationships.
  • Familiarity with the formula for calculating force based on area ratios.
  • Knowledge of unit conversions, particularly between pounds and inches.
  • Basic algebra skills for solving equations.
NEXT STEPS
  • Review the principles of pressure and force in physics.
  • Study the derivation and application of the formula F_1 = (A_1/A_2) * F_2.
  • Explore common errors in force calculations and how to avoid them.
  • Investigate additional examples of force calculations in different contexts.
USEFUL FOR

Students in physics, engineers, and anyone involved in mechanical calculations or force analysis will benefit from this discussion.

Gmaximus
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F_1=x
F_2=4000lbs
A_1=1.5 in
A_2=21 in

So, i did:
F_1=1.5/21 * 4000

Gave me 280 pounds.
My book, however, disagrees.
 
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Yes, but what is the problem??
 
Start with \frac{F_1}{A_1}=\frac{F_2}{A_2}
 
never mind guys, i did it right. The book was wrong.

The problem was solve for X.

Thanks anyway!
 
I wish someone would give me 280 pounds!
 

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