If the starting velocity was 0 m/s and the final velocity was -7.68 m/s, what is the average velocity of the rock?

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 law of reflection states that the angle of reflection is equal to the angle of

The ability to make things happen is also called a. heat b. force c. matter d. energy