Thanks a lot for your help Doc Al!
Now I think I can handle the other parts of the question
EDIT: So for the 2nd part of the question, I have a major problem (I think)...it tells me to find the force the side of table applies to ball...question is...F= Change in momentum / change in time...but...
I get confused with this question because I'm referring to other similar problems which don't have a direct right angle
so the change in velocity is 1.789 m.s-1? {from P's theorem}
Oh! haha duh! I meant to draw the resultant vector pointing the other way!
Anyways, does this mean that the change in velocity is just -0.8? That can't be right..
I drew this diagram, is it right or not? Does the resultant vector represent the change in velocity or is there more to it than this?
http://img463.imageshack.us/img463/3143/vectordiagram5hh.jpg
Thanks for the tip, I tried using it, and I made up a vector component thing, but I think I am totally wrong
http://img95.imageshack.us/img95/1408/vector4sq.jpg
I added 60 and 30, and the angle ended up being 90, so right angle
and I used Pythagoras' theorem, but I think that is not...
Hi guys, I am new here and I am having a LOT of trouble with this new momentum stuff, which I failed in :cry:
Here's a question:
A billiard ball has mass 210 g. It's hit with spin and bounces off the side of a table. The initial speed of ball is 1.6 ms-1 (at angle of 60 degrees) and its...