FRAMES AND MACHINES example problem with pliers

In this video I go through a frames and machines example problem that solves for the compressive forces of pliers.
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Process:
1. Isolate each member of the frame or machine as necessary to solve for the unknown forces and draw their free body diagrams. If you can, leave some of the members connected, making the connecting forces internal forces so that you do not have to solve for them.
2. Identify any two force members to simplify the process to solve for the forces in those members.
3. Usually break the known and unknown forces into their x and y components making it easier to solve for them with equilibrium equations. However, sometimes it is necessary to leave forces with the direction that they have initially and then solve for those forces using trigonometry.
4. Forces common to any two contacting members act with equal but opposite magnitudes on the respective members so draw them as such on the free body diagrams.
5. Unless otherwise stated, neglect the weight of the members.
6. Solve for the reaction forces on individual members using force and moment equilibrium equations.
7. Work your way through the members solving for unknown forces. Remember which forces on different members are the same due to them being connection reaction forces on the same connection.

[@bridgetdavenport6057]

This was great! I was taught to always guess support reactions as positive in both directions, therefore, I was getting the same values as you were but just with a negative sign sometimes.

[@studentengineering]

Thanks! Yep that’s a good way of doing it too!

[@jojo8alfozan]

That was so helpful thank you so much❤️❤️❤️❤️❤️

[@studentengineering]

You’re welcome! I’m glad it helped!

[@tylerderose1534]

Statics final in two days.. this helps a lot!

[@studentengineering]

Good luck with your final!

[@stephanedissake5166]

Amazing!! Thanks so much, its help a lot :)

[@studentengineering]

You’re welcome! I’m glad it helped!

[@god_kelpon4438]

thanks this really helped me for my class

[@studentengineering]

I’m glad! Thanks for letting me know!

[@STP31]

Thank you sir

[@studentengineering]

You’re welcome!

[@savreenbabra5534]

I had the same question in my practice problems! Just one question, when solving for B by doing the moment about A, why didn't we incorporate the angle there? Why was it not Bcos45 or something? Thank you!

[@studentengineering]

We didn't incorporate the angle of B because the problem already gave us the perpendicular distance between A and B which is what we need when solving for moments. Does that make sense?

[@saddam6355]

u should start from drawing of free body diagram

[@studentengineering]

Good idea!

[@zainaaljarhi3473]

شكرا مهندس

[@studentengineering]

I don’t speak that language. Sorry

[@zainaaljarhi3473]

@@studentengineering I would say thank you engineer

[@studentengineering]

You’re welcome!