You are an amazing teacher. So good at not over complicating the problems and cutting straight to the point of the problems. I learned statics from you really and I was stressing out about how to learn Dynamics without you until I saw that you posted new content! I hope that you keep the videos coming to keep pace with this semester!
DR. Hanson, thank for a challenging and powerful lecture on Equations of Motion with Dependent Motion. This is a difficult problem to comprehend from start to finish. The Free Body Diagram continues to be the driving force for all problems in Dynamics.
Question: You converted the right sight to Mass and then the left side is in pounds (never converted) and then divided. So without seeing the units is this answer correct?
that would be the case if he used the angle between 100lbs and his x-axis (x = 53.13 deg)... instead, he's using the angle between 100lbs and his y-axis (x = 36.87 deg)
How do we know Ta=Tb? For this to be the case wouldn't net force have to equal zero? and since their is an acceleration that cannot be the case, correct? Is this due to some special property of tension?
Sticking the calculator just an amazing solution hahahaa :) but it is a little useless dr.hanson. You can connect it with a rope on the table. Maybe you can fill its rounds something soft. I would want to see it :)
yes, that should be the case, I guess he just missed it somehow. He used the acceleration for b to calculate ds for A, which is twice the desired answer.
I think you missed something here. If block B moves 10cm up then both pulleys must have gone up 5cm, therefore the two sections of the top rope on the right (attached to top pulley and middle pulley and middle pulley and top fixed level) go up 5 on both sides, therefore A moves 10cm down the slope. It is still 1 to 1 between block A and block B but I think this is better reasoning. Let me know if I am wrong lol.
Freedom units = not the metric system, it's what we use in the US (Ft., in., lbs, etc) and slugs are a freedom unit because one slug = 1000 pounds. (A different form of a freedom unit lol)
why is Ta = Tb and not Ta > tB? if this is a statics problem i would understand but now the pulley moves up when A moves downhill. the only forces acting on it are Ta and Tb so by that meaning i thought Ta must be greater than Tb
You are an amazing teacher. So good at not over complicating the problems and cutting straight to the point of the problems. I learned statics from you really and I was stressing out about how to learn Dynamics without you until I saw that you posted new content! I hope that you keep the videos coming to keep pace with this semester!
DR. Hanson, thank for a challenging and powerful lecture on Equations of Motion with Dependent Motion. This is a difficult problem to comprehend from start to finish. The Free Body Diagram continues to be the driving force for all problems in Dynamics.
I loved the moment that you found positive acceleration and added a - by yourself. That's magic of teachers:)
JEFF I REALLY LOVE HOW YOU PRESENT ALL OF YOUR VIDEOS I AM STUDYING FOR THE MECHANICAL FE EXAM
Why don’t you have to use the same coordinate system for block a and block b ?
Thank you so much prof. Hanson for taking the time to do these videos.
Thanks Jeff... please keep it coming... studying for the FE over here!!!
did you pass brother?
always healthy and long life jeff!!!
Thank you professor Hanson, please keep uploading dynamics as your content is very helpful. Greetings
Shouldn’t the acceleration of block A be twice the acceleration of block B
yeah, shouldn't this be right instead
YES THOUGHT SO TOO. THIS IS RIGHTTT.
Thank you!! 😘
From Saudi Arabia
Question: You converted the right sight to Mass and then the left side is in pounds (never converted) and then divided. So without seeing the units is this answer correct?
At 7:49, why do you use "sine" for your x-component? Isn't Fx=Fcos(x)?
that would be the case if he used the angle between 100lbs and his x-axis (x = 53.13 deg)... instead, he's using the angle between 100lbs and his y-axis (x = 36.87 deg)
sir YOU ARE A LEGEND!!!!
Wall calculator is the true tell of an engineer
Rip wall calculator I spoke too soon
Acceleration of block B is 1/2 of block A. Then Ta=Tb=T=52# 18:59
How do we know Ta=Tb? For this to be the case wouldn't net force have to equal zero? and since their is an acceleration that cannot be the case, correct? Is this due to some special property of tension?
ur a boss, thank you
Sticking the calculator just an amazing solution hahahaa :) but it is a little useless dr.hanson. You can connect it with a rope on the table. Maybe you can fill its rounds something soft. I would want to see it :)
thank you
Great videos Dr Hanson! Any chance u got patreon? I pay $1165 for a course where they can not teach as simply as u do for free. I think I owe u.
Fantastic.
why is Ta equal to Tb? Isn't that only true if the pulley system isn't moving?
why was gravity not considered in the calculations
why didn't you get a=-a?
I couldnot understand why the accelaretion of B and A is same.
SAMEEE. B's SHOULD BE HALF OF A's.
Please start dynamics.we need u
shouldn't acc A = - 2 acc B ?
yes, that should be the case, I guess he just missed it somehow. He used the acceleration for b to calculate ds for A, which is twice the desired answer.
no, because if A move 10 then the system in the middle moves 5 up and the up system makes 2 times 5 rope so B will move 10 too
Best Proff
What is mass? How did you get 32.2???
32.2 is same as 9.81 but in us unit system
We are used to hearing 9.81 for gravity, but that's in "meters/s^2"...
32.2 is gravity but in "feet/s^2"
best of the best
how did you get the angle of 36.87??
tan inverse of 3/4
I think you missed something here. If block B moves 10cm up then both pulleys must have gone up 5cm, therefore the two sections of the top rope on the right (attached to top pulley and middle pulley and middle pulley and top fixed level) go up 5 on both sides, therefore A moves 10cm down the slope. It is still 1 to 1 between block A and block B but I think this is better reasoning. Let me know if I am wrong lol.
Why se need ti divide 100 with 32.2?
slug to kg? if im not mistaken
slug to lbs. my bad
@@muadzazri752 thanks bro
da hecks a freedom unit and slugs?
Freedom units = not the metric system, it's what we use in the US (Ft., in., lbs, etc) and slugs are a freedom unit because one slug = 1000 pounds. (A different form of a freedom unit lol)
I got confused by his last analysis of block B so I need to correct myself. Yes Ta=Tb=T and acca = accb=a Then I calculated T=56 , a=-3.864, s=-3.235
why is Ta = Tb and not Ta > tB? if this is a statics problem i would understand but now the pulley moves up when A moves downhill. the only forces acting on it are Ta and Tb so by that meaning i thought Ta must be greater than Tb
That was complicated