Simple Machines: Simple Machine: a mechanical device that changes the direction or magnitude of a force. Work: is done when a force that is applied to an object moves that object. Energy: ability to do work Compound Machines: a combination of 2 or more simple machines There are six simple machines: Simple machines make work easier. 1. Lever They make it easier to: 2. Inclined Plane Lift or move a heavy object Push things apart 3. Wedge 4. Screw Cut or objects 5. Wheel & Axle Hold an object together 6. Pulley Simple Machine How it Works How it Makes Jobs Examples Easier A lever is made of a It helps you to lift or 3 Classes of Levers: Lever stiff bar that rests on a pry things open/apart fulcrum. The bar is the more easily. part of the lever that 3 Parts of a lever: moves and the fulcrum 1. Fulcrum does not move. 2. Effort 3: Load/Resistance A flat surface that is It helps you push an Staris, Ramp, Roof, Inclined Plane higher on one end. object to a lower or higher place. Made up of two It you push two Wedge Axe, Knife, Tooth, Staple. incline planes that objects apart, or cut form together to create an object into pieces. 1 edge It can also hold objects into place. Bottom of light bulbs, jar top, Made from an incline It helps you hold Screw plane that winds objects together. It screw around a cylinder; it can also create holes. has ridges unlike a nail.
Simple Machines: Simple Machine: a mechanical device that changes the direction or magnitude of a force. Work: is done when a force that is applied to an object moves that object. Energy: ability to do work Compound Machines: a combination of 2 or more simple machines There are six simple machines: 1. Lever 2. Inclined Plane 3. Wedge 4. Screw 5. Wheel & Axle 6. Pulley Simple machines make work easier. They make it easier to: Lift or move a heavy object Push things apart Cut or objects Hold an object together Simple Machine How it Works How it Makes Jobs Easier Examples Lever A lever is made of a stiff bar that rests on a fulcrum. The bar is the part of the lever that moves and the fulcrum does not move. It helps you to lift or pry things open/apart more easily. 3 Parts of a lever: 1. Fulcrum 2. Effort 3: Load/Resistance 3 Classes of Levers: Inclined Plane A flat surface that is higher on one end. It helps you push an object to a lower or higher place. Staris, Ramp, Roof, Wedge Made up of two incline planes that form together to create 1 edge It you push two objects apart, or cut an object into pieces. It can also hold objects into place. Axe, Knife, Tooth, Staple. Screw Made from an incline plane that winds around a cylinder; it has ridges unlike a nail. It helps you hold objects together. It can also create holes. Bottom of light bulbs, jar top, screw