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    Physics - Simple Machines (Levers)

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    Levers, pulleys, and wedges are simple machines. Does the concept of work explain why we use these machines in our daily lives, how they work, and why they work? Explain your reasons in two paragraphs, taking examples from daily life.

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    Solution Preview

    The six most common simple machines are the: lever, pulley, inclined plane, wedge, screw, and wheel and axle.

    Consider the lever.

    A class-1 lever has the fulcrum located somewhere between the effort and the load. With this kind of lever, the direction of

    force is changed. Effort applied downward moves the load up. Effort applied upward moves the load down.

    A class-2 lever has its fulcrum at one end of a lever arm. The load is between the fulcrum and the effort. ...

    Solution Summary

    The solution discusses simple machines in general and the different classes of Levers.