(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Which of the following are vectors? (Select all that apply.)

a] ‹ 0.7, 0.7, -0.7 ›

b] ‹ 0, 2.3, -1 ›

c] 0

d] 5×‹ 33, 1.04, -9.5 ›

e] −3×10−6

f] 3.5

Which of the following are vectors? (Select all that apply.)

a] a-> (the arrow is above the a)

b] r->/2

c] |r->|

d] 10r->

e] ‹ rx, ry, rz ›

f] r

2. Relevant equations

A vector has a magnitude and direction.

3. The attempt at a solution

I originally choose a and b because those are in the form that I'm familiar with...that of a position vector. However, this homework assignment is online and apparently those two are not correct. I then tried a,b, and d, since d (from what I can tell) is just a scalar multiplied by a vector...the answer of which is indeed a vector as well, but that wasn't right either. I think that c, e, and f are scalars. I really have no idea why the answers I gave are not correct, and would appreciate it if someone could shed some light on my errors.

For the second problem, I thought that the answer would have been a and e. C is obviously the magnitude, and b & d are multiplied by a scalar. F is just a scalar, too. But as I decided in the first problem, multiplying a scalar by a vector just makes a vector. So I suppose I need to try a,b,d,and e?

I'm feeling PRETTY dumb right now, since this is the homework after the first night. Encouragement as well as help would be greatly appreciated.

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# Homework Help: Basic vector questions

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