Simple Machines and Their Purposes

Inclined plane = Reduce force needed to lift objects Wheel and axle = Transfer force from one point to another Lever = Change the direction of the applied force Pulley = Multiply the force applied to lift objects

Stapler = Apply a single downward force Wheelbarrow = Transfer heavy loads with less effort Scissors = Cut materials using two blades Screwdriver = Turn screws to fasten or unfasten objects

Wedge = Two inclined planes put back to back Gear = Toothed wheel that meshes with another toothed wheel Axle = Rod that connects two wheels for rotation Cam = Rotating piece that pushes against another part to create motion

<p>Cutting vegetables = Knife (wedge) Lifting heavy buckets = Pulley system Opening a door = Door handle (lever) Turning a faucet = Valve (wheel and axle)</p> Signup and view all the answers

<p>Reduce friction = Lubricant (fluid) Hold objects together = Screw (inclined plane) Separate objects = Scissors (lever) Hold objects in place = Clamp (wheel and axle)</p> Signup and view all the answers

<p>Hammer = Strike to drive nails or break objects Tongs = Grasp and lift hot objects Wrench = Tighten or loosen nuts and bolts Crowbar = Pry or lift heavy objects</p> Signup and view all the answers

<p>Fixed single pulley = Changing the direction of force Inclined plane = Changing the distance of effort Bicycle = Changing the strength of a force Bottle opener = Applying a weak force over a long distance to exert a strong force</p> Signup and view all the answers

<p>Effort (F) = Force exerted on a simple machine or compound machine by an external body Load (L) = Force exerted by a simple machine or compound machine on an object to be lifted or moved</p> Signup and view all the answers

<p>Work input = Effort multiplied by the distance moved by effort Work output = Output provided by a machine to move a load</p> Signup and view all the answers

<p>Human pushing or pulling = Common energy source for applying a force Gasoline or electricity = Alternative energy source for applying a force</p> Signup and view all the answers

<p>Simple machines do not lessen work done = Although they make work easier, they do not reduce the total amount of work Simple machines act as force or speed multipliers = They can increase either the force applied or the speed at which work is done</p> Signup and view all the answers

<p>Effort = Force exerted on a simple machine or compound machine by an external body like a human being Load = Force exerted by a simple machine or compound machine on an object to be lifted or moved</p> Signup and view all the answers