Simple Machines
Instructions: From levers and pulleys to wheels and inclined planes, discover the six clever machines behind the everyday tools we all use.
- 1.
A seesaw on a playground is a classic example of which simple machine?
APulleyBLeverCWedgeDScrew - 2.
How many classic simple machines are recognized in science?
AFourBFiveCSixDEight - 3.
A ramp leading up to a loading dock is an example of which simple machine?
AWedgeBLeverCInclined planeDPulley - 4.
Which simple machine is used when you raise a flag up a flagpole?
ALeverBWedgeCPulleyDScrew - 5.
An axe splitting firewood uses which simple machine?
AScrewBWedgeCWheel and axleDLever - 6.
What is the fixed point on which a lever rests and rotates called?
APivot boltBFulcrumCAxleDBearing - 7.
A bolt that holds pieces of wood together uses which simple machine?
AInclined planeBWedgeCPulleyDScrew - 8.
A doorknob turning to open a door is an example of which simple machine?
ALeverBPulleyCWheel and axleDInclined plane - 9.
Using a movable pulley instead of a fixed pulley has what advantage?
AIt doubles the distance you must pull the ropeBIt cuts the effort force needed roughly in halfCIt makes the load move fasterDIt changes nothing — both pulleys do the same work - 10.
Which class of lever has the load between the fulcrum and the effort?
AFirst-class leverBSecond-class leverCThird-class leverDFourth-class lever - 11.
A spiral staircase is most closely related to which simple machine?
ALeverBPulleyCScrewDWedge - 12.
What term describes how many times a simple machine multiplies your input force?
APower ratioBMechanical advantageCForce coefficientDEffort index - 13.
Which simple machine does a zipper use when it closes?
ALeverBPulleyCWheel and axleDWedge - 14.
The ancient Egyptians are believed to have used inclined planes to build the pyramids. Roughly how much less force is needed to push a stone up a ramp that is 10 metres long and rises 1 metre compared to lifting it straight up?
AAbout 2 times less forceBAbout 5 times less forceCAbout 10 times less forceDAbout 20 times less force - 15.
No simple machine can increase both force and distance at the same time. This is a consequence of which scientific law?
ANewton's Third Law of MotionBThe Law of Conservation of EnergyCBoyle's LawDThe Law of Universal Gravitation