- #1
gracy
- 2,486
- 83
Is it true that we can't use the formula ##f##= ##\frac{-dU}{dx}## when external source of energy or some external force is present?
I think it should rather be "we can't use ##f##= ##\frac{-dU}{dx}## when non conservative force is present" because potential energy is defined only for conservative force .
(U in the above formula is potential energy , right?)
I think it should rather be "we can't use ##f##= ##\frac{-dU}{dx}## when non conservative force is present" because potential energy is defined only for conservative force .
(U in the above formula is potential energy , right?)