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:
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.
