Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**atran****Member**- Registered: 2013-07-12
- Posts: 91

Hi,

There are at least two types of quantity: scalar quantity and vector quantity. Both have magnitude, but only the vector quantity has direction. A unit is a magnitude. Thus, if F is a vector quantity, then |F| is the magnitude of the quantity.

Am I thinking right?

Thanks for help...

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

|F| is the norm or Euclidean distance from the origin of the vector F,

Sometimes it is written like this.

There are other types of norms.

What is A unit?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**atran****Member**- Registered: 2013-07-12
- Posts: 91

Say x=10 metres: is the magnitude of x 10 or 10 metres? I believe the latter is true.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

The magnitude is 10 meters.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**atran****Member**- Registered: 2013-07-12
- Posts: 91

Hi;

The magnitude of a number is its absolute value.

The magnitude of a vector is its length.

The magnitude of a scalar (e.g -10°) is the quantity itself.

Am I thinking right?

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

Magnitude is always a positive. A scalar is any number. It can be positive or negative.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

Pages: **1**