Relier Pairs LET'S SIMPLE MACHINESVersion en ligne Know machines and ttheir function. par maria backer baraza 1 We use wheel and axle 2 We use lever 3 We use screw 4 We use a pulley 5 We use a wedge 6 We use gears 7 We use an inclined plane to cut objects. to move or lift objects. to hold objects together — such as wood — and to position objects. to push objects up or down. 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 lift objects.