Question

|Ā=B = 5 units. Ĉ is a vector such that
Ā+ B + C = 0. What is the magnitude of C ?​

Answer 1

Answer:

Let

x

ˉ

=30 units

B

ˉ

=44 unit

c

ˉ

=5 units

A+B=C

′

squaring m both side

(A+B)

2

=C

2

=1

A

2

+B

2

+2ABcosθ=C

2

3

2

+4

2

+2×3×4cosθ=5

2

24cosθ=25−25

cosθ=0/2

cosθ=0

θ=cos

−1

(0)=90

o