1M20.40 Giant Lever
Mechanical advantage, torque, work, energy
A lever can be used to lift a person.
-  Wooden beam
-  Fulcrum
-  Steel rod
-  Safety glove
- Put the fulcrum near a table or lectern that a volunteer can grab.
- Mount the beam on the fulcrum with the short end near the table or lectern. The ratio of lengths for the short arm to the long arm can be 1:2 or 1:3.
- Wear gloves when lifting the beam by hand. The wood tends to splinter.
- The person standing on the lever should have a spot to hold on in case she or he loses balance.
- Put on the gloves.
- Lift the long arm of the lever so that the short arm touches the ground.
- Get a big, beefy volunteer to stand on the short arm of the lever.
- Push down on the long arm of the lever using the gloves, raising the volunteer.
- Slowly let the volunteer back down.
Variant: small and weak-looking second volunteer lifts the big beefy one. In that case, the lifter should wear the gloves and know not to drop the big beefy person at the end.
- PIRA 1M20.40
- "Give me a place to stand and with a lever I will move the whole world." – Archimedes
- Don't attempt this at home!
If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.