Hi vanhees71 and arildno,
Thanks a lot for your prompt reply!
I see. So ∫dx δ(x+y)f(x) will equal to f(-y),
if f(x) is an even function, then
∫dx δ(x+y)f(x) = f(y)
if f(x) is an odd functoin, then
∫dx δ(x+y)f(x) = -f(y)
Am I correct? I am sorry if I still not able to get the...
Homework Statement
Good day.
May I know, for Dirac Delta Function,
Is δ(x+y)=δ(x-y)?
The Attempt at a Solution
Since δ(x)=δ(-x), I would say δ(x+y)=δ(x-y). Am I correct?
So can I summarized all the things as follow (the wheel rolls without slip):
for an accelerating torque (clockwise) acting on a wheel, causing it to roll from left to right,
the one that causes acceleration is static friction, which points to the right and other than that, there will be another...
Hi everyone, First of all, I am very sorry that I misplaced the post.
Next, I noticed that the question is viewed by 135 people, but no replies. Am I not putting enough effort in solving my question? But i think i have first answered my question right?
I am new here, so please tell me if i...
Hi Jack, thanks for your reply!
your reply made me understand somethings but at the same time some questions arose.
Below is a paragraph from here, http://cnx.org/content/m14385/latest/
[
When the external force is passing through center of mass, it only produces linear acceleration as there is...
I think I can understand now. Thanks a lot!
If it is really a spool pulled by a rope, for r1 > 0.5r2, the spool will roll, while for r1 < 0.5r2, the spool will slide right?
One last question will be, can you explain why for a front wheel drive, there is no friction acted on rear wheel? How to...
Hi everyone, good day. this might be a simple question, but I need someone to check my answer.
A disk and a hoop, of same mass and same diameter, is first giving a torque (same amount of torque for both) then the torque is removed (the torque is acting on them for the exact same period of...
Hi Jack, i think i can get it now. Thanks a lot for your help!
Regarding my problem on the friction force, is it possible for you to clarify to me? I really want to know how it really works.
["F_t = F_tf + F_tr
this formula is just a general formula right? i mean the sign of the front...
Hi Jack, sorry for the late reply, i was quite busy for the past few days.
you are solving the question by taking the braking force as percentage of the max friction force. Can I approach the question the other way? that is by using sum of moment equals to mass moment times angular acceleration...
Jack action, in the acceleration section, theory part in the same page that contain the animated drawing, the force from tires, F_t is given by
F_t = F_tf + F_tr
this formula is just a general formula right? i mean the sign of the front wheel force and rear wheel force will depend on what type...
Hi jack action, thank you very much for your reply!
first i want to apologize, because the website you gave me is actually blocked by my country's internet service provider (i am also curious on the reason), I cannot access to that website and thus i searched google hoping to find something...
Nope, this is not a homework assignment. i want to know this because i am joining a competition, which involving building a fuel efficient car. I attached my fbd and calculation with the post, can you see it?
since uniform rolling does not have friction acting on the wheel, i think maybe it will...
Hi everyone, Good day.
for the effect of friction on wheel (all the questions are based on rolling without sliding), i know that in the case of uniform rolling, there will be no friction on the wheel. while for accelerating or decelerating case, there will be friction on the wheel (but in...
Also, Dickfore, is it possible to take the effect of rolling resistance into account?
as i know, rolling resistance is actually a decelerating torque created by the offset-ed normal force due to the deformation of wheel and ground. so i just include this torque into
−F_fr R= I_0ε?