A crate with a mass of 100 kg glides through a space station with a speed of 3.5 m/s. An astronaut speeds it up by pushing on it from behind with a force of 180 N, continually pushing with this force...

A crate with a mass of 100 kg glides through a space station with a speed of 3.5 m/s. An astronaut speeds it up by pushing

on it from behind with a force of 180 N, continually pushing with this force through a distance of 6 m. The astronaut moves

around to the front of the crate and slows the crate down by pushing backward with a force of 170 N, backing up through a

distance of 4 m. After these two maneuvers, what is the speed of the crate?