How are wheelbarrows, can openers, and bicycle brakes alike? Why is it easier to hold a bolt tight with a pair of pliers than with your bare hands? Why is it easier to eat a carrot with back teeth than with your front? Why is a seesaw considered a machine? This book shows you how different kinds of these simple machines are all around you to make your work and play easier.
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How are wheelbarrows, can openers, and bicycle brakes alike? Why is it easier to hold a bolt tight with a pair of pliers than with your bare hands? Why is it easier to eat a carrot with back teeth than with your front? Why is a seesaw considered a machine? This book shows you how different kinds of these simple machines are all around you to make your work and play easier.
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Seller's Description:
The item shows wear from consistent use, but it remains in good condition and works perfectly. All pages and cover are intact (including the dust cover, if applicable). Spine may show signs of wear. Pages may include limited notes and highlighting. May NOT include discs, access code or other supplemental materials.
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Seller's Description:
Very Good. Size: 8x0x11; Has some shelf wear, highlighting, underlining and/or writing. Great used condition. A portion of your purchase of this book will be donated to non-profit organizations. Over 1, 000, 000 satisfied customers since 1997! Choose expedited shipping (if available) for much faster delivery. Delivery confirmation on all US orders.