- #1

- 4

- 0

- Thread starter antjm
- Start date

- #1

- 4

- 0

- #2

arildno

Science Advisor

Homework Helper

Gold Member

Dearly Missed

- 9,970

- 132

However, as you are well aware of when signing up here at PF, you have a duty to show what you have done so far.

- #3

- 4

- 0

i know that the gradient (F) is -3i +8j

i think Duf(2,4) would be same

i think vector a = <3,4> to unit would be <3,4>/5

- #4

- 4

- 0

i think i got it. grad (f) doted with unit

- #5

arildno

Science Advisor

Homework Helper

Gold Member

Dearly Missed

- 9,970

- 132

That is correct!i think i got it. grad (f) doted with unit

Now, if your vector "a" was <2,4> as you wrote initially, that procedure is still the right one, but your unit vector would be somewhat different than if "a" was <3,4>.

Agreed?

- #6

- 4

- 0

Agreed, a = <3,4> therefore magnitude would be 5 if a =<2,4> magnitude would be 2rt(5)

thanks

thanks

- #7

arildno

Science Advisor

Homework Helper

Gold Member

Dearly Missed

- 9,970

- 132

It was a pleasure!Agreed, a = <3,4> therefore magnitude would be 5 if a =<2,4> magnitude would be 2rt(5)

thanks

It is always great to meet a student like you who, when asked to do something on his own, suddenly hits upon the right procedure all by himself (as you did).

Then I know the student (in this case, you), have mastered the particular problem better than if I just had handed over the solution.

- Last Post

- Replies
- 6

- Views
- 2K

- Last Post

- Replies
- 18

- Views
- 14K

- Last Post

- Replies
- 3

- Views
- 1K

- Last Post

- Replies
- 3

- Views
- 1K

- Last Post

- Replies
- 5

- Views
- 5K

- Last Post

- Replies
- 2

- Views
- 1K

- Replies
- 4

- Views
- 2K

- Last Post

- Replies
- 3

- Views
- 2K

- Replies
- 5

- Views
- 2K

- Last Post

- Replies
- 4

- Views
- 2K