|
|
|
|
|
 Community Discussion Question:
vectors
|
| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 Apr 2008 20:50:33 IST
|
|
|
the resultant of 2 forces P,Qis equal to P in magnitude and that of 2 forces 2Pand Q act same angle is also P.find Q in terms of P and angle
|
WINNERS DON DO DIFFEREN THINGS THEY DO THINS DIFFERNLY
HATE MAN U, HATE ME
|
|
|
|
|
|
|
|
P2 +Q2 +2PQcosx=P2
Thus,Q=-2Pcosx
Using 2nd condition,
3P2+Q2+4PQcosx=0.
Subst. Q in terms of P in this eqn. You get cosx=+ or -root(3)/2
Thus,x=30 or 150.
|
MaNuTd RoXxXx..MaNuTd 2 WiN PrEmIeR LeAgUe ThIs SeAsOn ToO AlOnG WiTh ChAmPiOnS LeAgUe.....HaiL RoNaLdO ...HaiL LaMpArD... |
this reply: 7 points
(with 1 
in 2 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
21 Apr 2008 21:06:07 IST
|
|
|
can oyu also find Q in terms of P
|
WINNERS DON DO DIFFEREN THINGS THEY DO THINS DIFFERNLY
HATE MAN U, HATE ME
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
21 Apr 2008 21:08:48 IST
|
|
|
We know Q= -2Pcosx
Subst. cosx=   3 /2
U get Q=  3 P
|
MaNuTd RoXxXx..MaNuTd 2 WiN PrEmIeR LeAgUe ThIs SeAsOn ToO AlOnG WiTh ChAmPiOnS LeAgUe.....HaiL RoNaLdO ...HaiL LaMpArD... |
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
