Vector Dynamics: Example, kinematics of rigid bodies (linkage)

[@Householdfilms2]

When you solve for the two equations at the very end, you had the acceleration at a = (6i - 8j), but when making the two separate equations, you made 8 positive. If that was not a mistake, why did you end up doing that? Otherwise, seriously great video. This filled me in on two weeks worth of material. Hopefully I do good enough on this test (:

[@CPPMechEngTutorials]

Nice catch. At 8:58, the left side of the second equation (containing the y terms) should be -8 instead of 8. The answers for alpha_AB and alpha_BC are correct though. I just placed a note about this error in the comments.

[@dr.engineering201]

CPPMechEngTutorials please do mor examples on general plane motion and explain where you be these formula from.

[@premkc6582]

pls add some more videos related to kinamatics of rigid bodies

[@bigmoneymiller7174]

What an incredible and clear-cut video. Thank you.

[@KooKKoZ]

how did you get omega AO to become 10 k? was that given?

[@CPPMechEngTutorials]

Yes. That is a given.

[@Chan-ux7ej]

Thank you for this video. I was able to follow through the entirety of the video, however, I had trouble with one concept. I could understand why the angular acceleration of AO is zero (due to its angular velocity being constant), but I was wondering why we didn't assume the same for angular acceleration of BC. Would love clarification

[@adharshsrinivasan6942]

At 8:17 when substituting the fomula u have menationed a(c) to be 0 but still u have still taken the value Can u explain why?

[@CPPMechEngTutorials]

a_c = 0 because it is a fixed point. Can you please explain what you mean by "but still u have still taken the value"?

[@adharshsrinivasan6942]

Why havent you considered alpha(BC) value as 0?

[@CPPMechEngTutorials]

Why should it be 0?

[@antonioworrell5524]

I'm having a little trouble with that as well. If you considered alpha (ao) as zero because it had a constant angular velocity wouldn't alpha (ac) be considered as having such as well?

[@TomFisherEng]

9:04 you say 2 equations and 2 unknowns but I see 3 unkowns. Please could you explain? I followed everything up until here.

[@CPPMechEngTutorials]

What are the 3 unknowns?

[@andriuszapasnikas5184]

Hi, are you sure your answer for alfa ab (min. 9:03) is correct? I am getting -56.25 Rad/Sec. : because if Wab=2.5 and Wbc=5.833 then 8=-6.124+0.625-0.24 alfa ab

[@andriuszapasnikas5184]

sorry ignore my previous comment. I have just read pinned comment. Thanks for great video

[@ensaiosmecanicos3562]

sorry, but i can't see where the values for W^2(BC) and W^2(AB) came from... are they equal to zero or are they unknowns?

[@havalothman3783]

In which book can I find that exercise plz ? can you recommend some books whchs have solutions for the exercises Thank you!

[@hassanhassani2912]

i need info on collision for linkage systems. can anybody help?

[@vredekhoo3944]

8.52 , should term 'aA' be 6j-8i rather than 6i-8j? Since aA=wAO x rAO=10k(-0.06i+0.08j)= 6j-8i?

[@CPPMechEngTutorials]

Yes. Nice catch. At 8:58, the left side of the second equation (containing the y terms) should be -8 instead of 8. The answers for alpha_AB and alpha_BC are correct.

[@chandramoulidharmana]

thank u sir i hope it can helps me in my tomorrow examination.

[@CPPMechEngTutorials]

Let us know how it goes.

[@mehmetalivat]

Pure amazing solution step by step.

[@ensaiosmecanicos3562]

shouldan't normal acceleration component (W^2 x r) be negative?

[@sayanjitb]

For which arm?

[@Kadoc0]

I am extremely grateful for this video! Thank you!

[@CPPMechEngTutorials]

Our pleasure.

[@mrdod9162]

Why is the velocity at Va=0?? Doesn't it have a velocity?

[@CPPMechEngTutorials]

Can you provide a time stamp where the velocity at A is said to be zero?

[@JordanAXJ]

Why alpha BC is not zero since omega BC is a constant of 5.833 rad/s ?

[@LuisMoreno-zj5vg]

nice 9:38

[@harrikarhumaa2614]

Whats the value of k hat? I cant understand....

[@jonbowman7686]

it doesn't have a value, it's vector notation

[@kapilansatkunanathan4257]

THANK YOU !!!!!

[@CPPMechEngTutorials]

No problem.

[@ahnaffdanish9099]

No problem...

[@okonyaempire]

loved it

[@CPPMechEngTutorials]

Thanks!

[@cl3375]

ahh thank you!

[@CPPMechEngTutorials]

Glad you enjoyed it.