Question

Find the specified vector or scalar.
u = -4i + 1j and v = 4i + 1j; Find |u+v|

a. square root of 34
b. 5
c. 2

Answer 1

Do you know how to add vectors?

Answer 2

no

Answer 3

Add each of the components. So add the i components and the j components

Answer 4

i + 2j

Answer 5

No, -4 + 4 = 0 so it should be 0i. 0 x i = 0 so that goes away and you're just left with 2j

Answer 6

The magnitude of 2j is just a scalar in a 1-dimensional direction, and the scalar of the unit-vector is 2

Answer 7

so it would be c?

Answer 8

yes

Answer 9

thank you