Recent content by Sum

I have never used Kochan's. So i can't say much of it. But once you get the basics of c language, you can use any other book. Just start with Deitels and move on.

IMO; Kernighan and Ritchie's "The C Programming Language." is best used as a reference text not a beginners guide. It assumes you know how to compile and run your programs. Today, there exist so much stuf on beginning c on internet, google! I've used Deitel's "how to program in c" and its a good...

I recommend Devc++ ide from www.bloodshed.net. Its a free ide and good one for newbies. You could also try codeblocks.

i didn't imply that angels exist! That apart, i beleave you know that velocity is a vector (size & direction). In ur case the initial velocity (when the ball is moving toward the wall) is u=12m/s. The final velocity (ball moving away from the wall after being reflected/bounced, this velocity...

if u can't get the obvious, then no one would help u. even angels can't make u understand! open ur eyes!

Its clear now! Thanks Borek for ur response.

I've always wondered how one achieves the title of a prof/Dr in any field. Is there any difference in these titles and the work the individuals holding them do? what level of education is required? Anyone who knows, pls help. Thanks in advance.

Only the reverse velocity should be -ve. It seems the method used in ur manual is unclear. This might help: f=ma=m(v-u)/t with m=0.2kg, u=12m/s, v=-8m/s & t=0.04s substitute in the equation: f=0.2(-8-12)/0.04=-100N

Hi Feodalherren, the -ve sign tells u that the 100N force exerted by the wall to the ball is in the opposite direction. Its a consequence of Newton's 3rd law of motion.

This is what i think: Adhesion forces btn water molecules and the walls of the tube do the work of moving water up.