The spring is released and a 0.10-kilogram plastic sphere is fired from the launcher. calculate the maximum speed with which the plastic sphere will be launched. [neglect friction.] [show all work, including the equation and substitution with units.]

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?

A36,287 kg truck has a momentum of 907,175 kg • . what is the truck’s velocity

According to the second law of thermodynamics, what is true of entropy in all natural systems? a.it will always decrease. b.it will always increase. c.it will always remain the same. d.it is impossible to measure. e.it will always equal zero.