Uses simple experiments to explore wheels, pulleys, levers, friction, and lift in terms of inventions and discoveries underlying the modern mechanical world.
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Uses simple experiments to explore wheels, pulleys, levers, friction, and lift in terms of inventions and discoveries underlying the modern mechanical world.
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Add this copy of Work & Simple Machines (Science Factory) to cart. $14.98, fair condition, Sold by ThriftBooks-Atlanta rated 5.0 out of 5 stars, ships from Austell, GA, UNITED STATES, published 2000 by Copper Beech Books.
Add this copy of Work & Simple Machines (Science Factory) to cart. $62.06, new condition, Sold by Just one more Chapter rated 3.0 out of 5 stars, ships from Miramar, FL, UNITED STATES, published 2000 by Copper Beech Books.
