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  1. S

    Spings Launching Balloons

    Question 56 in the 6 minute solutions for Machine Design is a problem about launching balloons with springs. I believe the solution to the number of springs required to launch the balloons is wrong. This should be a conservation of energy analysis. The springs do not exert the full 2.51 pound...
  2. S

    Slider Crank eq. from Mark's Handbook

    I believe that the solution to the slider crank problem is wrong in the 6 minute solutions book 2nd edition. It says that the arm BC rotates around its instantaneous center, point C with the same angular velocity as the crank. That is a FALSE statement. If that were true then the distance...
  3. S

    Please clarify this gear problem

    Problem #338 is a typo. The errata for the 2008 Mechanical practice exam can be found at this link. 2008 NCEES Mechanical Errata The Errata for the 2001 Practice exam can be found at this Link
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