I need help and it due today rip...

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

The energy produced as a result of this flow of electrons from atom to atom is called

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?