Lever - Something similar to a see-saw that can lift an object, Inclined Plane - A ramp, Wedge - Something that can split an object apart, Screw - Something that can hold things together or lift an object, Wheel and axle - Something that reduces the friction of moving something, Pulley - Something that uses a rope and can change the direction of a force,

Simple Machine Matching

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?