Question

Find magnitude of vector ā=i+2j​

Answer 1

The unit vector in the direction of the given vector

a

is

a

^

=

∣

a

∣

1

a

=

5

1

(

i

^

−2

j

^

)=

5

1

i

^

−

5

2

j

^

Therefore , the vector having magnitude equal to 7 and in the direction of

a

is

ℸa=7(

5

1

i

^

−

5

2

j

^

)=

5

7

i

^

−

5

14

j

^