 | | 46 products found for wedges  | Describes what ramps and wedges are and how they work, different types of ramps and wedges and their uses, and other facts about these simple machines. |  | Discusses the invention of six simple machines in various ancient civilizations from the Stone Age to the fall of the Roman Empire. |  | Uses a variety of examples, from scissors and axes to zippers and hairpin turns, to demonstrate the power of the inclined plane and show how ramps and wedges make work and play easier. |  | Uses a variety of examples, from scissors and axes to zippers and hairpin turns, to demonstrate the power of the inclined plane and show how ramps and wedges make work and play easier. |  | | | |  | Uses everyday examples to show how wedges are simple machines that make pushing, pulling apart, and lifting easier. |  | Uses everyday examples to show how wedges are simple machines that make pushing, pulling apart, and lifting easier. |  | |  | |
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