if the force moving an object points at least partially in the positive direction of the objects motion the work is considered to be

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

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?