Recent content by k1point618

Synchronization Phenomena: (Many of you probably have seen this, but it's still quite interesting) So I'm wondering how "exactly" this thing work? I have sort of a vague understanding... but not completely sure. Thanks for commenting & explanations!

Ah, i c~ and i got it right =D ThanX

Homework Statement Two satellites are launched at a distance R from a planet of negligible radius. (Yes, that's what the problem says...) Both satellites are launched in the tangential direction. the first satellite launches correctly at a speed v_0 and enters a circular orbit. The second...

hm... Don't quite understand how you relate the graph of F vs. a to gradient (you mean the vector gradient?). Also another question in 2008 Test: http://aapt.org/Contests/upload/olympiad_2008_fnet_ma.pdf" #18 The answer is c Is it because that... the gravitational force is exerted by the...

Thank you for noticing the typo in the data! Well for #10: If Kinetic friction exists, then F = ma = Fspring - Ffriction F = Fspring - m*g*mukinetic? Since there are two unknowns: muk and m, just take two cases to set up two equations? AH HAH! I took the first and the last trial and...

I saw that they gave F and a, so F = ma, I tried to find m, except that the m i obtained is different every time, varying from 30 to 10kg. #11 i guessed it correctly, but i didn't have much reasoning. Static friction is the force that the spring has to overcome in order to accelerate the...

These two problems are based one some data from an experiment. Of course, experiment often don't carry out perfectly matching theory... And I'm having some difficulty understanding the answer. Problem: The following information applies to the next two problems An experiment consists of...

Thank you!

ah... so in this case, P(A or B) =P(A) +P(B), well that makes sense.

Oh, i see. So ... P(A)= 12/17+11/16 and P(B) = 5/17 + 4/16? and does P(A and B) = P(A)*P(B) ? I'm not sure

I don't remember how exactly to do the following kind of possibility problems... for example... there are x amount of object A, and y amount of object B. How do you find the possibility of choosing 2 numbers such that they are either both A or both B? more specifically, ex) You have 12...

K, THANK YOU!:smile:

so the different hieghts of the ceiling does not matter to the problem?

Sorry, Over a ceiling, but the ropes are fastened at different heights.

So i was wondering, why does the problem give the length of the ropes? and how does the high difference of the cieling affects the problem?