I'm working on some homework and I've become stummped on two questions (one of them is wrong, the other is right). The bolded answer is the answer I've chosen.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Question 3 10 points Save

Which one of the following quantities is a vector quantity?

A. the age of the earth

B. the mass of a freight train

C. the earth's pull on your body

D. the temperature of hot cup of coffee

E. the number of people attending a soccer game

Question 4

Two vectors A and B are added together to form a vector C. The relationship between the magnitudes of the vectors is given by A + B = C. Which one of the following statements concerning these vectors is true?

A. A and B must be displacements.

B. A and B must have equal lengths.

C. A and B must point in opposite directions.

D. A and B must point in the same direction.

E. A and B must be at right angles to each other.

Anyone have any thoughts?

thanks for any help

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# Homework Help: Basic Conceptual Questions

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