- #1

luxiaolei

- 75

- 0

in Electromagnetism, we introduced a scalar potential psi, such that:

E = - grad Psi

and In newton's law, there is also a scar potential U, such that:

F= -grad U

My question is, one is the gradient of a scalar field give a field and a force???!!

Can anyone help me with understanding this? That would be great, and many thanks in advance!