Sunday

April 20, 2014

April 20, 2014

Posted by **JORHO** on Sunday, December 2, 2012 at 8:14am.

A=?+4j+4k

B=?+2j+3K

if the angle them 15 deegre

a.) by scalar product

b.) by vector product

- UNIVERSITY PHYSICS 1 -
**drwls**, Sunday, December 2, 2012 at 9:47amAre the two ? symbols the same numerical i component, or are they different? You have one equation in each case and can only have one unknown.

If the ? components are x, the scalar product is

A*B = x^2 + 8 + 12 = x^2 + 20

and it also equals

|A||B|cos15 = sqrt(x^2+16+16)*sqrt(x^2+4+9)cos15

In principle, you could now solve for x^2, but it would be messy.

x^2 + 20 = sqrt[(x^2+32)(x^2+13)]*0.9659

- UNIVERSITY PHYSICS 1 -
**jorho**, Sunday, December 2, 2012 at 11:06pmsame i

**Related Questions**

university physics - find the magnitude of vectors A=?+4j+4k B=?+2j+3k if angle ...

UNIVERSITY PHYSICS 1 - Find the magnitude of vectors A=?+4j+4k B=?+2j+3k if ...

physics - find the magnitude of vector by scalar and vector A= ? + 4j +4k B...

Calculus-PLZ help! - Given u=3i-2j+k,v=2i-4j-3k, w=-i+2j+2k, 1 Find a unit ...

math - the position vectors of the point A,B & C respect to O are a=3i-2j+4k, b=...

Physics - Suppose A=3i-2j+k, B=-i-4j+3k&C is a vector lying along x-axis with ...

Elementary mechanics - (Q1) 2 forces act on a point object as follows: 100 at ...

Engineering - The angular velocity of a rigid body rotating about an axis of ...

Physics - Problem2-AFor A=-I+2j +5k and B=2j-3k,find: a) The dot productA.B b) ...

physics - Suppose vector A=3i-2j, B= -i-4j and vector C are three vectors in xy ...