Rigid Bodies Relative Motion Analysis: Acceleration Dynamics (step by step)

Learn to solve engineering dynamics Relative Motion Analysis: Acceleration with animated rigid bodies. We go through relative acceleration, angular acceleration, relative velocity, and angular velocity. Learn through step by step solutions with animations.

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Intro (00:00)
Bar AB has the angular motions shown (01:06)
The disk has an angular acceleration (04:38)
The slider block has the motion shown (06:01)

Book used: R. C. Hibbeler and K. B. Yap, Mechanics for engineers - dynamics. Singapore: Pearson Education, 2014.

[titryano]

oh my god I cant believe i have found such understandable youtube videos with regard to mechanic. I am a freshman in major of mechanical engineering. I have been so frustrated when it comes to dealing with this relative rigit body. now everything has turned.
thanks a lot.

[adrianalopez]

All your videos are truly amazing & and are getting me through Dynamics with an A. They're definitely short and concise. Thank you so much for all that you do! 👍🏽👍🏽

[camerongillespie]

These make everything so simple. Your detailed animation and vector analysis is top notch. Thank you for your time and hard work.

[judemancilla]

I wish I’d found these videos earlier. They’re very helpful, thank you!

[chisai]

Omg only when the figures are moving I eventually understand what’s going on. Thank you very much!

[sukhwindersingh-lfbm]

Bru you saved my life. your work is appreciated <4 thank you so much.

[fra]

There is also an acceleration center to simplify the second equation, at 3:44 (analogous to IC)

[pnaronal]

You rock!!! Your explanations are clear as vodka

[cyva]

I love this so much, the best educational videos on yt I came across. Thank you!

[lamtran]

Your voice sounds so calm 💙
Thank you for the TUT. Very informative and straight foward.

[vikramnagarjuna]

Hi this is vikram from India. Finally I got rigid body dynamics from you...

[mahdeeabdoh]

thank you so much . What a great explanation of high quality and in a short time

[simranjatav]

Really amazing explaination....i didn't get any videos of such great explaination on YouTube i got video of yours on searching...a ray of hope generates...you have also too clear voice...cuz i am indian...so bit difficult to understand foriegner...but i get ur each point very of love sir ❤️☺️

[Randommemeschipi]

Hi, thanks a lot for these videos, you do help to revise for finals.
I am confused towards the negative sign before the normal acceleration ("-w^2*r") at 0:58, the original equation has a plus instead of minus.
In your video: Rigid Bodies: Rotation About a Fixed Axis Dynamics at 3:30 you show that the normal acceleration is positive (" + w cross x cross r ").
It would be great if you could clarify the use of different signs. Thank you

Edit: In our lectures it's called the two point theorem

[aliraza-zlft]

Too much good video ang good concepts I had never comment on any video on utube before but yours videos are amazing

[bugrahan_ztrk]

at 1:00 and 2:40, for the formula of acceleration, why did we subtract normal acceleration from tangential acceleration? as i know acceleration was addition of them.

[kmdqrvh]

4:54 why could we measure the acceleration of the centre of the wheel directly using (angular acceleration)*r ? Where is the reference of 0.5m? Is it the zero velocity at the bottom of the wheel? I thought that the acceleration equals (angular acceleration*r)-w^2r so how could we ignore the last part?

[menna]

I can't thank you enough!! such helpful videos !

[tommyminahan]

Seriously thank you for these amazing videos. You are amazing

[studyhard]

Hello, I have a question. At 8:53, α_AB was negative, so we knew it was clockwise. But why did α_C turn out clockwise even though it's output was positive? Shouldn't it be negative for it to be clockwise?