- #1

oahz

- 13

- 0

Work = Force X Distance.

? = Distance X Force

How do you make sense of the second equation?

? = Distance X Force

How do you make sense of the second equation?

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- Thread starter oahz
- Start date

- #1

oahz

- 13

- 0

Work = Force X Distance.

? = Distance X Force

How do you make sense of the second equation?

? = Distance X Force

How do you make sense of the second equation?

- #2

tommyxu3

- 240

- 42

But it doesn't happen everywhere in physics. For example, the non-commutativity of matrices finally implies the uncertainty principle.

Edited for getting uncleared at the same time.

- #3

ShayanJ

Gold Member

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- 605

2) The multiplication defined for real numbers is commutative, doesn't matter in what field of science you're considering it. But the more general definition of work is through ## W= \vec F \cdot \vec D ##. So we should talk about the inner product defined on vectors. That is commutative too and again it doesn't matter in what field of science you're considering it.

- #4

e.bar.goum

Science Advisor

Education Advisor

- 953

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Work = Force X Distance.

? = Distance X Force

How do you make sense of the second equation?

Do you mean commutative? (Associative -> a+(b+c) = (a+b)+c, commutative a*b=b*a). https://en.wikipedia.org/wiki/Commutative_property

And physics is associative/commutative when the mathematics you are using is. The rules don't change when you're doing physics. If you multiply scalars, it is associative and commutative. If you are multiplying matrices, it is not commutative in general.

- #5

oahz

- 13

- 0

Yes, I mean commutative.

- #6

- 35,997

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Yes, I mean commutative.

Then the answer is yes and no.

A cross product is not commutative. A dot product is.

A vector product is not commutative. A scalar product is.

And the multiplication of operators need not be commutative.

This should be in Math, not Physics.

Zz.

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