- #1
MeMoses
- 129
- 0
Homework Statement
I have vector R. I need to show the R dot dR/dt = 0 => 1/2 d/dt[R dot R]
Homework Equations
The Attempt at a Solution
I guess I've never really applied the chain rule to dot products and its throwing me off. How does one go from R.dR/dt=0 to 1/2 d/dt[R.R] = 0. I have no idea to be honest. I'm not sure which direction to take it, all I know is it uses the chain rule. Sorry I haven't done much with this. I hope you can help. Thanks