Question

The x and y components of A are 4 m and 6 m, respectively.
The x and y components of (A+B ) are 10 m and 9 m
respectively. The magnitude of vector B is:
(a) 19m (b) √27 m ) √45 m (d) √50 m

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Answer 1

Explanation:

vector law is associative

B = (A+B) - A = (10i + 9j) -(4i+6j)

= (6i + 3j)

magnitude = √(6^2 + 3^2) = √45 m

option c is correct