The components of vectors Q and R are (-3.0, 5.5) and (9.2, 4.4) respectively. Determine the components of Q + R.
A
(3.7, 7.4)
B
(6.2, 9.9)
C
(2.5, -4 .8).
D
(14.7, 1.4)
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Put the vectors in their component forms
Q( -3.0i, 5.5j) and P(9.2i, 4.4j)
Q + P = -3.0i, 5.5j + 9.2i, 4.4j = ( - 3.0 + 9.2)i + ( 5.5 + 4.4)j = ( 6.2i + 9.9j)
therefore Q + P = (6.2 , 9.9).
Source: Myschool Past Questions Archive (Record #61962)