Dynamics 02_14 Polar Coordinate Problem with solutions in Kinematics of Particles

solution for The piston of the hydraulic cylinder gives pin A a
constant velocity v= 3 ft/sec in the direction
shown for an interval of its motion. For the instant
when 30 , determine , , , and where r = OA
Solution for engineering Dynamics
Dynamics problem solution
Introduction to rectilinear motion
Kinematics of Particles
Physics motion
Dynamics Animation
How to solve dynamics problem
how rectilinear motion are solved
Introduction to motion
how to solve rectangular coordinates
solution of Engineering mechanics dynamics seventh edition, how to solve problems with simple steps
Examples of rectilinear motion
formulas of rectilinear motion, Formulas of physics

[@smc1423]

Why are we using values for acceleration? Acceleration doesn't move on a curve in this question so how can there be acceleration when velocity is constant? I think the correct way is to set the acceleration which is zero to its polar coord expression and solve each component equal to zero for r dot dot and theta dot dot.

[@yohannes_solomon]

Thanks Buddy appreciated

[@sciencewithavdheshsir8016]

Thanks buddy

[@sushmitamandal1677]

Sir can u explain atheta = atangential?

[@rohelshrestha6470]

how does the normal acceleration has positive value in 9:03

[@ethanboba5262]

I believe the acceleration in the radial direction is: ar = r' ' - r * theta ' not ar = r' ' + r * theta ' . At least, this is what I've learned from class. Please let me know why you did a sign change.

[@KasmaTutorial]

Yes, you are correct. It is corrected on the video after clip ⏲15:02 (minutes of video).
Thank you for your comment.

[@Phuhcough]

.577*4.5^2-11.7 = 0

[@Phuhcough]

Which means r^.. = 0. Thank you so much for helping with everything else

[@realityobservationalist7290]

Yeah I thought I was going crazy...

[@shashanks6269]

Hi,
From Which book you have taken this problem?

[@sushmitamandal1677]

Meriam

[@pable7199]

Thanx man

[@KasmaTutorial]

You are welcome!