Space debris left from old satellites and their launchers is becoming a hazard to other satellites. One can estimate how long such a collision lasts; if an object of length l is traveling at a velocity v, it will cover a distance l in a time equal to l / v. This is the approximate time of interaction for an object being smashed against another object. Suppose a loose rivet is in an orbit of the same radius that intersects the satellite's orbit at an angle of 90. What is the speed (in m/s) of the rivet relative to the satellite just before striking it