Question

A vector A of magnitude 6 and another vector B have a resultant magnitude 12. The vector B:

a. must have a magnitude of at least 6 but no more than 18
b. may have a magnitude of 20
c. cannot have a magnitude greater than 12
d. must be perpendicular to A

Answer 1

A vector A of magnitude 6 and another vector B have a resultant magnitude 12. The vector B: must have a magnitude of at least 6 but no more than 18
As,

a+b > r
b > r-a

b >12-6
b> 6