What is the resultant of a and b if a = 3i + 3j and b = 3i − 3j?
Answer
A
6i + 0j
B
9i − 9j
C
6i + 6j
D
9i + 9j
Explanation
To find the resultant, add the corresponding components: (3i + 3i) + (3j − 3j) = 6i + 0j. The j-components cancel, so the resultant is 6i + 0j, choice A.
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