The acquisition of passive with instrumental prepositional phrases in English

A vehicle seat adjuster includes a first track member attached to the seat and a second track member attached to the vehicle body. The track members are slidably interengaged to permit longitudinal movement therebetween whereby the seat may be adjusted fore and aft. A friction shoe mounted on one of the tracks is vertically movable into frictional engagement with the other. An operating lever is attached to a cam which permits the seat occupant to move the friction shoe to selectively lock and unlock the seat for fore and aft adjusting movement. The force of kinetic impact energy overcomes the frictional engagement of the friction shoe against the other track of the seat adjuster to permit energy absorbing movement of the seat.