- #1

yakattack

- 5

- 0

For non-inertial frames show that the in-frame time derivative D obeys:

D(f

__a__)=fD

__a__+df/dt

__a__

Where f is a scalar function and

__a__is a vector.

I know that Df=df/dt and that D

__a__= the sum of the derivatives of the components of

__a__times the relavant basis vector. But can't seem to apply this to prove the question.