Question

If Bbar=2icap + 4jcap and Abar=icap - jcap the vector having the same magnitudes as that of Bbar are parallel to Abar is ?​

Answer 1

Magnitude of vector B is |B|=sqrt(7^2+24^2)=sqrt(49+576)=sqrt(625)=25

Magnitude of vector A, {A|=sqrt(3^2+4^2)=sqrt(9+16)=sqrt(25)=5

Vector A can be written as

A=(3/5)i+(4/5)j

= (3/5*25)i+(4/25*25)j

=15i+20j,

This is the vector parallel to A and

|A|=25={B|

Answer 2

Answer:

|A|=25 is the correct answer