Machines make tasks easier By adding strength and speed Can alter force direction too There’s a type for every need [Break] Famed are those electrical But some are pure mechanical And they're found everywhere Complex, simple, let's compare [Break] Washing machines clean clothes Tablets play us videos Robot arms automate Trains transport people, freight [Break] But six machines there are Mechanical, and by far Pure in form and function Let's make our introduction Leever, pulley, wedge, screw Wheel with axle too And lastly there’s the inclined plane Or “ramp” to give its common name [Break] The function of a Leever Like crowbars or a mop Is either to force amplify Or force with speed and range swap [Break] Changing force direction A Pulley moves things around Makes light work of heavy stuff Think cranes lifting loads from ground [Break] To redirect force out, or hold That is what a Wedge is for Like head of axe splitting wood Or stuff ‘wedged’ under a door [Break] A Screw attaches, or moves stuff Rotation force to straight line goes Like spiral lid of a jar Or drills that bore and clear holes [Break] To multiply a turning force It’s what a wheel with axle does Like the driver’s steering wheel That turns the tyres of a bus [Break] And last an inclined plane That trades range for force To push up ramp is easier Than lifting straight up, of course [Break] So six machines there are Mechanical, and by far Pure in form and function Let's make our introduction Leever, pulley, wedge, screw Wheel with axle too And lastly there’s the inclined plane Or “ramp” to give its common name [Break] Yes, six machines there are Mechanical, and by far Pure in form and function We’ve made our introduction Leever, pulley, wedge, screw Wheel with axle too And lastly there’s the inclined plane Or “ramp” to give its common name
