please please answer all of them Introduction to Vectors Problem 1. Which of the

Question

please please answer all of them

Introduction to Vectors Problem 1. Which of the vectors in the graph corresponds to (-3, 1)? (a) A (c) C (e) None of these (b) B (d) D Problem 2. What is the direction of vec- tor A in the graph at right? (a) 30° east of north (b) 60 east of north (c 30 west of north (d) 60° west of north (e) None of these Problem 3. The vectors X. Y. and Z are labelled on the figure at right. Which of the following equations is true? (a) Z=X-Y (c) Z=X+7 (e) None of these (b) Z-Y-x

Explanation / Answer

1) (a) vector C

(-3,1) means it lies in the quad2. There are 2 vectors there; B and C. B's y-component is certainly more than 1, so the correct option is c.

2) (a)

options c and d can be discarded off, since we are not concerned with direction west.

East of north means the angle the vector is making with the y axis, and it is 30 degrees and not 60. So the option a is correct.

3) (a)

By law of vector addition.

4) (d)

By law of vector addition.

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