If #r_1=4hati+hatj-4hatk#, #r_2=-2hati+2hatj+3hatk# and #r_3=hati+3hatj-hatk#, then show that #|r_1+r_2+r_3|=7#?
1 Answer
Feb 18, 2018
See the explanation below
Explanation:
The resultant of the vectors is
Therefore,
The modulus is