Aglider of mass 5.0 kg hits the end of a horizontal rail and bounces off with the same speed, in the opposite direction. the collision is elastic and takes place in a time interval of 0.2s, with an average force of 100n. what was the speed, in m/s, of the glider? a glider of mass 5.0 kg hits the end of a horizontal rail and bounces off with the same speed, in the opposite direction. the collision is elastic and takes place in a time interval of 0.2s, with an average force of 100n. what was the speed, in m/s, of the glider?