All of the following forces are central force, EXCEPT

Semua yang berikut adalah daya berpusat KECUALI
A)Coulomb force
Daya Coulomb
B) Frictional force
Daya geseran

2 answers

Friction force, unlike gravitational or electrostatic is not directed toward a source like a center of mass or a charge. Friction is therefore not a central force.

Did you get your earlier one about a = F/m (1- e^(bt/m) )
alright?
I mean
a = (F/m)e^-(bt/m)