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Question:

help w/ science project using TWO simple machines to build a device that lifts.?

For a science project, my class needs to build a device consisting of TWO simple machinesIt must be able to lift 600 grams at least 5 cmI need help finding some sketches of these types of devices in hopes of creating my own sketch to present and then complete the project using some simple productsYour help is appreciated.once again, I basically need: SKETCHES OF A DEVICE USING TWO SIMPLE MACHINES, or TWO SIMPLE MACHINES THAT MAKE A LIFTING DEVICE.(instructions w/ the links would also be helpful)thanks again :)

Answer:

Its easier to produce assemble manufacture stack round cans then square cansthey roll along assembly lines and ship easier as well and its alot easier to hold and drink from a round can than a square one wouldnt you agree
Round and domes are structurally stronger than flat and/or square-flat surfaces.
can you imagine if it were square or triangle? the corners would hurt! ouch!!! X0
Good questionI submit that it's for comfort purposesNo 90deg corners or anglesLeads to a pleasant consumption of tasty beverageAnd if you want someone to toss you a can you don't have to worry about losing an eye (normally)
you only need one machinea motorwith that, use a crane or a scaffold with a rope over a pulley, and make the motor wind the rope onto a SpoolSo you have made a winch/craneIF there are any more restrictions to your problem, please post them.

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