- #1
yazz912
- 45
- 0
1. The problem statement, all variables and given/known
If C is a smooth curve given by
r(s)= x(s)i + y(s)j + z(s)k
Where s is the arc length parameter. Then
||r'(s)|| = 1.
My professor has stated that this is true for all cases the magnitude of r'(s) will always equal 1. But he wants me to PROVE it. ( of course not with an example)
2. Homework Equations
r(s)= x(s)i + y(s)j + z(s)k
r'(s)= x'(s)i + y'(s)j + z'(s)k
3. Attempt at the solution
To be quite honest, usually with math problems I will have some sort of attempt to try and solve it. But when it comes to proofs... I seem to get stuck.
Well I know I'm trying to prove that. ||r'(s)|| = 1
So the magnitude of r'(s)
Will be given by
SQRT[ x'(s)^2 + y'(s)^2 + z'(s)^2 ]
After this I don't know what I can do to make it equal 1. Any help will be greatly appreciated!
If C is a smooth curve given by
r(s)= x(s)i + y(s)j + z(s)k
Where s is the arc length parameter. Then
||r'(s)|| = 1.
My professor has stated that this is true for all cases the magnitude of r'(s) will always equal 1. But he wants me to PROVE it. ( of course not with an example)
2. Homework Equations
r(s)= x(s)i + y(s)j + z(s)k
r'(s)= x'(s)i + y'(s)j + z'(s)k
3. Attempt at the solution
To be quite honest, usually with math problems I will have some sort of attempt to try and solve it. But when it comes to proofs... I seem to get stuck.
Well I know I'm trying to prove that. ||r'(s)|| = 1
So the magnitude of r'(s)
Will be given by
SQRT[ x'(s)^2 + y'(s)^2 + z'(s)^2 ]
After this I don't know what I can do to make it equal 1. Any help will be greatly appreciated!