Simple Machines: Forces in ActionCapstone, 2016 - 48 pàgines -How did the Ancient Egyptians build the pyramids? -What is an Archimedes' screw? -Which wedge do you use every time you eat? Do It Yourself offers an exciting new approach to understanding and investigation. Each book helps you conduct your own experiments and activities to learn more about the world around you. |
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adult to strike amount of effort amount of force Archimedes attached bicycle Bicycle wheels bike blades block of wood broom handles changes the direction direction of force double pulley easier to lift edge effort needed effort to move first-class lever fixed pulley Food coloring friction fulcrum heavy load hole hole puncher inclined plane wrapped increasing the distance irrigation jackhammer lessens the effort lever arm lever lever lift a load lift heavy lift the container lift water load moves load with less Measure and record moveable pulley needed to lift object pedals pencil pinwheel ramp record the length record the number requires more effort rocks roller roller skate ruler Scissors screwdriver second-class lever seesaw side single pulley skateboard skyscraper spool Steps to follow straw thick nail thin nail thin wedge third-class lever travels tubing types of simple wedge changes wedge-shaped wheel and axle wheelbarrow