Recent content by Shoku Z

Ok,thanks!Thanks for informing about Coxeter Geometry book.I just checked reviews on Amazon and it's a 5/5.Let's see what happens!Thank you n1person and rasmhop!

Thanks a lot,Rasmhop!Why did you say 3 months is really less for IMO unless I'm a genius?And there is one more thing I've always wanted to ask!I've this book which has old IMO problems.I can't even solve one problem!Is this the case with everyone else who have not yet started their...

Thanks,I'm from India.And yeah,we too have qualifying tests and they are tough.And I was talking about Paul Zeitz's book.Is that any good?Does he own that Art of Problem Solving site?Thanks again

Hi!So,I am going to start my preparations for these olympiads.First round is in Nov-Dec,so I've like 3-4 months max.This is the first time I'm participating in both of these olympiads(And sadly,it's also the last). Physics:I've An Introduction to Mechanics by Kleppner-Kolenkow,Problems in...

So does that mean charge actually decrease in magnitude or something like that?

Exactly!It depends upon the material just like friction.Google Co-efficient of restitution.

Is there anything like 'charge contraction'?I am noob when it comes to relativity,but I've never heard about that before.Heard about length contraction though.

How tough is that book?I have heard a lot about it from my friends.They say it has the toughest physics problems.Is it really that tough?I've seen that book,looks scary but have never opened it because I fear I won't be able to solve them and I will get humiliated in front of others.I am...

In short,Delta is right.I didnt see his post!

The object initially was on the surface of Earth and so the velocities of Earth and the object are same.We carry it up and then drop it.observing from earth,the trajectory will be a straight line.This is because the velocity of the object is same as Earth.The only other force acting upon them is...

Ha,OP google gravity train.Interesting concept.And the result shocking!

Yeah,just want to make it clear!

No,its no v-1, its v_1.I don't know how to use subscripts on mobile.v_1 is the velocity with which the ball bounces up after striking the floor 1st time. v_2 2nd time v_n nth time

Vanadium is absolutely correct.A zero vector has indefinite direction

Suppose that an object is dropped from a height 'H'.The coefficient of restitution be C. Now,C=v_1/u.Therefore,v_1=Cu This v_1 is the speed with which it bounces.Then,it strikes the floor again. And again,C=v_2/v_1 v_2= C.v_1 = C^2 u Similarly,v_3= C^3u v_4=C^4u and so on. Suppose...