How does paddling move a boat forward? Why does a wheelbarrow have only one wheel? What does a counterweight do? Levers are simple machines that can be used to make other machines work. When you used a shovel, play on a seesaw, or use a bottle opener you are using lever. Levers explains what levers are and how they help you do everyday things.
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How does paddling move a boat forward? Why does a wheelbarrow have only one wheel? What does a counterweight do? Levers are simple machines that can be used to make other machines work. When you used a shovel, play on a seesaw, or use a bottle opener you are using lever. Levers explains what levers are and how they help you do everyday things.
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Add this copy of Levers (Machines in Action) to cart. $104.10, new condition, Sold by GridFreed rated 4.0 out of 5 stars, ships from North Las Vegas, NV, UNITED STATES, published 2000 by Heinemann/Raintree.
