Electrostatic force between uniformly charged hemispheres consider a uniformly charged sphere with radius r and total charge q. show that the top half exerts a net force on the bottom half given by f =- 641ter2 hint: what is the net force that the top half exerts on the top half?

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.