1.a man thought he could lift the world with just a lever!
2.levers help us lift things with less effort
3.a lever is one of the most basic forms of simple machines
4.a lever can be described as a long rigid body with a fulcrum along its length
Questions 1.where does the fulcrum go?If the wood is 1m the fulcrum goes 30cm along its body
2.how far can the object travel? 1m or less
3.how fast can the object go? 1 sec depending on weight
4.do you have to weigh a certain weight?you have to weight 34 kg or more
5.how have levers changed over time? Levers were first developed around 440 million years ago.a long time after that,maybe about ten million years ago some kinds of animals discovered how to use artificial levers 
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