Difference between a vector and a scalar

A scalar is just a number, and a vector is a number with a direction involved.

In the first question, pounds, newtons, and dynes are all *forces*. A force can’t exist as just a number; force has to be directed somewhere. 2 kilometers/hour east gives you a number and a direction. The answer a) is just a speed. You can know something is traveling 2 miles/hr without knowing what direction it’s traveling. You can’t say something is simply exerting 2 pounds of force; it has to be exerting it on something else.

In the second question, we’ve already said that 2 miles per hour was a scalar. 2 apples is obviously directionless. 2 kilograms and 2 liters just tell you how much of something you have. 2 ounces here must mean ounces in a pound rather than fluid ounces. So these are a weight, which is again a force and has to be directed somewhere.

Another example:-

I need to know what the difference is between them to answer these questions:

Which of the following is NOT a vector quantity?
a.) 2 miles per hour
b.) 2 pounds
c.) 2 newtons
d.) 2 kilometers per hour east
e.) 2 dynes

Which of the following is NOT a scalar quantity?
a.) 2 miles per hour
b.) 2 kilograms
c.) 2 apples
d.) 2 ounces
e.) 2 liters

I’m not looking for you to answer the questions as I already know the answers[ a.) and d.) – from the book] but I need to know the difference between a scalar and vector quantity so I can answer them myself. The book is simply a workbook and has no explanations.

4 Responses to Difference between a vector and a scalar

  1. ozoderm says:


    Thanks for taking the time to debate this, I feel strongly about it and love studying extra on this topic. If possible, as you acquire expertise, would you mind updating your blog with further information? It is extremely useful for me….

  2. oto kiralama…

    I feel that is a fascinating point,…

  3. oto kiralama…

    Great articles & Nice a site.. Hey very nice blog!!…

  4. yurtdIsI eğitim…

    Your point is valueble for me. Thanks. I think it is the cool Digital timer info…..

Leave a Reply

%d bloggers like this: