FM2 1 Analysis of Locking Pliers

This video demonstrates how to analyze a set of locking pliers. A series of free-body diagrams wherein each component is pulled apart at the pin connections is required. Along the way, we find out about mechanical advantage and how to turn a small force into a very large force.
There is indeed a goofy mistake at about 3 min where the orientation of part AC is determined. Same mistake that I see from my students frequently and caution them against: assuming, in this case, where two points are located and not going through the details.

[@BussinMoto]

Thank you kindly for posting this! Basic mechanics videos are so useful!! =)

[@solidkreate5007]

Tool Designer, I have my first ste of Locking Pliers to design. This helped out quite a bit. Thank you very much.

[@arsalanahmad4669]

Thanks man, Great Job

[@miszcz310]

Just found this video. Great work! Thank you!

[@dougschmucker8212]

thank you! you are welcome!

[@mayeru8971]

sorry to ask this so late but i think ac's in x axis does not equal to 90 because point D and point B is not at the same y axis

[@OwenHodges]

I agree. It’s 120+36-(42+30) = 84

[@dougschmucker8212]

Looks like I rushed through and made the same mistake as my students! Good catch...@@OwenHodges

[@rolandn1677]

When calculating the moment around D, I think it should be (R x Fac SinO) in other word ( radius vector X force AC X sinO) the angle theta is the one between the radius vector and the force. In this case I would say:Md=(-26*300)+(6*ac3/sqr10)

[@rezaathari740]

part 2?

[@dougschmucker8212]

I am surprised that it is not in the playlist, also. These were created so long ago (last time I taught Statics), that I do not recall how many of the inclass examples were also posted. Entirely likely that it simply was not done. Or, it sits somewhere else and just wasn't added to the playlist.