|

Mechanics

Cool goIITian

 Joined: 8 Jan 2011 Post: 93
8 Mar 2011 08:22:55 IST
0 People liked this
2
747
cn 3 vectors nt in a plane gve a zero resultant? Cn 4 vectors do?
Engineering Entrance , Medical Entrance , AIPMT , JEE Main , AIIMS , JEE Advanced , Physics , Mechanics , Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

cn 3 vectors nt in a plane gve a zero resultant? Cn 4 vectors do?

Hot goIITian

Joined: 2 Apr 2009
Posts: 197
11 Mar 2011 00:15:50 IST
0 people liked this

in case of 3 it  surely can..........n in case of 4 i thnk it can.......

Blazing goIITian

Joined: 8 Oct 2008
Posts: 8064
11 Mar 2011 01:06:44 IST
0 people liked this

hi

No. For three vectors they must all lie in the same plane.

let us consider 2 vectors first.for them to resolve to zero, they must be in opposite direction and equal magnitude. So they will lie along the same line.
for 3 vectors: take two of them. Any two vectors will lie in the same plane, and their resultant vector will also lie in that plane. Find the resultant of the first two vectors, and the third vector must be along the same line (equal magnitude, opposite direction), in order to result to zero, Since the third vector is along the same line as the resultant vector of the first two, then it must be in the same plane as the resultant of the first two. Therefore it lies in the same plane as the first two.

And for four vectors not in same plane (two may be in same plane ) cn have zero resultant ..

 Some HTML allowed. Keep your comments above the belt or risk having them deleted. Signup for a avatar to have your pictures show up by your comment If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team

For Quick Info

Name

Mobile

E-mail

City

Class

Find Posts by Topics

Physics

Topics

Mathematics

Chemistry

Biology

Institutes

Parents Corner

Board

Fun Zone

Vertical Limit

Top Contributors
All Time This Month Last Week
1. Bipin Dubey
 Altitude - 16545 m Post - 7958
2. Himanshu
 Altitude - 10925 m Post - 3836
3. Hari Shankar
 Altitude - 9960 m Post - 2185
4. edison
 Altitude - 10815 m Post - 7797
5. Sagar Saxena
 Altitude - 8625 m Post - 8064