How Machines And Tools Help Us
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Demonstrates that man has devised ways of making work easy with the aid of simple tools, engines and motors, and by harnessing such natural forces as wind and water., Explains how machines make work easier as Jack and his father build a brick fireplace. Shows Jack's father getting two "helpers" to aid in the construction--a lank and a wheelbarrow--and describes the operation of the lever principle and the inclined plane. Demonstrates other "helpers" including the hammer, pulley, water wheels, boat sails, automobiles, and airplanes.
Complete catalog record
Demonstrates that man has devised ways of making work easy with the aid of simple tools, engines and motors, and by harnessing such natural forces as wind and water., Explains how machines make work easier as Jack and his father build a brick fireplace. Shows Jack's father getting two "helpers" to aid in the construction--a lank and a wheelbarrow--and describes the operation of the lever principle and the inclined plane. Demonstrates other "helpers" including the hammer, pulley, water wheels, boat sails, automobiles, and airplanes.NOTE: Two (or more) records have been merged together to create this data.
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Original permalink · Record added 2023-02-27 16:52:03