FE Exam Review - FE Mechanical - Four Bar Linkage - Kinematics - Part 1

[@AAA-bb8bf]

why did you assume Vb is always perpendicular to the link at13:40? and also how can we determine the sign of ω3 and ω4? Thank You

[@directhubfeexam]

Hi we know the angular velocity is always - r x V. The angular velocity is maximum when V is perpendicular to the link, therefore we always want the perpendicular velocity vector. The sign convention is based on the right hand rule. Clockwise is negative counterclockwise is positive.

[@AAA-bb8bf]

@@directhubfeexam thank you.

[@KKK-jt6cc]

You might be confused with perpendicularity in this case (that the velocity has direction of link towards O2) because it is Vb/a to be precise, so this is the velocity of point B relative to the point A.

[@MuhammadAwais-jh2dy]

in solidworks how can i introduce rpm in mechanism from given data ??

[@johnmcauliffe8824]

Quick Question, why did you solve this using vectors when the exam handbook provides an equation that can be used for this situation?

[@directhubfeexam]

Here’s part 2 using that handbook method. Knowing how to do it this long way will definitely help if it’s a linkage system of any sort often tested under dynamics. kzbin.info/www/bejne/iZyylaGvpdeKgNU

[@johnmcauliffe8824]

@@directhubfeexam got it

[@luisguevara4113]

I am studying for the mech FE right now and I could not get this consent no matter how much I tried until I saw this video. Thank you!

[@directhubfeexam]

I’m glad this helped !

[@Luvaboyace]

Have you took the test yet??

[@farooquenadeem5300]

would we get a question this long on the FE exam knowing that there's so many questions and so little time???

[@directhubfeexam]

@@farooquenadeem5300 Not this long. But definitely know the concept here.

[@manishaupreti9138]

Thank you for this amazing material.

[@directhubfeexam]

You’re welcome! Thank you for watching and for your practice!

[@fahmighabi8456]

thank you very much

[@directhubfeexam]

You’re welcome!!

[@kingsleychimonya2311]

Good stuff. Thank you!

[@coolguy6819]

Thank you sir!

[@directhubfeexam]

You're welcome, don't forget all the necessary equation are in the FE Handbook! Take care.

[@coolguy6819]

@@directhubfeexam Will do. More power!