Matching Pairs LET'S SIMPLE MACHINESOnline version Know machines and ttheir function. by maria backer baraza 1 We use screw 2 We use an inclined plane 3 We use lever 4 We use gears 5 We use wheel and axle 6 We use a pulley 7 We use a wedge to lift objects. to move or lift objects. to push objects up or down. to cut objects. to change the direction of movement and/or increase the output speed or torque. to reduce friction of the moving vehicle with the ground. to hold objects together — such as wood — and to position objects.