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Multiplication with Vectors

What is the ...

Question

What is the $y$ component of the vector shown in above figure?

3 c m

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6 c m

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- 4 c m

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- 6 c m

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none of the those answers

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Solution

The correct option is A $3 c m$
Answer (A). Take the difference of the $y$ coordinates of the ends of the vector, head minus tail: $1 - (- 2) = 3 c m$ .

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A B C D E

A D = 11 c m, A G = 6 c m, A F = 2 c m, A B = 3 c m, C G = 6 c m, E F = 4 c m

In a parallelogram ABCD, O is the midpoint of intersection of diagonals and OC= $3 c m$ , OB= $6 c m$ . What is AC and BD respectively?

In figure, M, N and P are the mid-points of AB, AC and BC respectively. If MN = 3cm, NP = 3.5cm and MP = 2.5cm, calculate BC, AB and AC.

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∠ B A C

A B = 6 c m, A C = 4 c m

B D = 3 c m

B C

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D C .

O A = (3 x - 4) c m, O B = (x + 3) c m, O C = 6 c m

O D = 3 c m,

x .

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