Question

If a unit vector is represented by 0.5i +0.25 j+ ck, then the value of c, is
(1) 1
(2) 10.71 . (3) 20.01
(4) 10.39​

Answer 1

heya there

your answer will be 1. 1

Answer 2

unit vector magnitude is 1

So √( 0.5)^2 + (0.25)^2 + c^2 = 1

0.25 +0.0625 + c^2 = 1

0.3125 + c^2 = 1

c^2 =1-0.3125= 0.6875

c= 0.82

most closest option is 1)1