cause-effect c.pdf

"' ;ad this article about two kinds of simple machines. Then answer the: testions.The Whbbl ahd:th.e Axl€Simple,,mbchines are,uieful,,becauie they,help .pe.o,ple do things that they iould notdo o,n:::theii .:*wn.':.The,,,wheal and the axle are two simple machines.foui..*,hee.ls,,b.,a.,c5,r,,,,have a bar that::is attbched :to t,hd:1,b.o.ntfb...of. .the..wl'ieel. This ba r is,,Ch.|led..f n...,.axle. The axle causes the wheels to spin.Skateboards have axles. So do rollerskates andbirycles. Look around you. Think about the simplemachines that help you do things that you couldnot do on your own.backward, The iteering wheel inside the cir turns thetwo front wheels. When a driver turns the steeringwheel to the right, the front wheeli of the Car iuin tothe right. When ihe driver turns the steering wheel tothe left, the froni wheels of the car turn to the left.Many wheels, like the'frl.\44rat causes the fiont u.heelsof a car to turnf@ the engine@ the steering u'heelO the axle@ abarSimple machines are useftilbecause they@ cause people to do things thel'rrou,ld nof usua111' 4o.I move the fiont r,r'heels of a car.O help people do things theYcould not do on their owl1.O help r,r'heels turn and sPin.lI. What happens u'hen a driver turnsthe steering r,vheel to the leftf@ The tyres spin.@ The fiont u'heels turnto the right.O The car moves backrvard.@ The front u'heels turn to the left.L2. The part of a car that causesthe rvheels to spin is called the@ axle.@ fi ont u'heel.O steering u'heel.@ driver.rS Book C CA1005 O 2006 Hawker Brownlow EducationRecognising Cause and Effect