Question

Find the magnitude of the vector 2i-5g+2k

Answer 1

Explanation:

Correct option isA

142i−3j+k

We have 2i^ −3

j + k^

Let u=2

i

^

−3

j

^

+

k

^

Unit vector is of the form

u

^

=

∣u∣

u

⇒

u

^

=

∣

∣

∣

∣

2

i

^

−3

j

^

+

k

^

∣

∣

∣

∣

2

i

^

−3

j

^

+

k

^

=

2

2

+(−3)

2

+(1)

2

2

i

^

−3

j

^

+

k

^

=

4+9+1

2

i

^

−3

j

^

+

k

^

⇒

u

^

=

14

2

i

^

−3

j

^

+

k

^

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