Wednesday

January 28, 2015

January 28, 2015

Posted by **Mat** on Tuesday, October 2, 2007 at 4:51pm.

If aA+bB+C=0, find the magnitudes of a and b.

*A, B, and C are vectors*

*i and j are unite vectors*

A=(6.0i-8.0j)units

B=(-8.0i+3.0j)units

C=(26.0i-19.0j)units

How is that possible without a second equation for the relationship between a and b? You can't do substitution or anything. And by lokking at it for an extended period of time, we found that a=5 and b=7 works, but we don't know how to find that using algebra.

help??

- Science -
**bobpursley**, Tuesday, October 2, 2007 at 5:31pmYou have a second equation. Do the i, j separately..

i:

6a -8b+26=0

j

-a8+3b-19=0

solve for a,b

**Answer this Question**

**Related Questions**

physics [vectors] - The concept i get, but somehow i just can't execute this ...

physics - Vector has a magnitude of 136 units and points 35.0 ° north of west. ...

Vectors - Two vectors, A and B, are added by means of vector addition to give a ...

URGENT - Vectors - Two vectors, A and B, are added by means of vector addition ...

Physics or Math - A force F = 0.8 i + 2.5 j N is applied at the point x = 3.0 m...

physics - Two vectors have magnitudes V1 = 1.5 km and V2 = 4.5 km. What are the ...

physics - Vector has a magnitude of 122 units and points 37.0 ° north of west. ...

physics - If I have a unit vector of (2.06 j)m/s(I have no i vector because it's...

Physics - You are given vectors A = 5.0i - 6.5j and B = -2.5i + 7.0j. A third ...

physics - Displacement vectors A, B, and C add up to a total of zero. Vector A ...