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Ships within 48 hours · Estimated delivery Aug 21 - Aug 26
UPC: 094051321009
white board erasers
rainy days
SKU: ERSHTM94470-2
MPN: 006569
Simple Machines Block & Tackle sensors) UPC: 094051321009MPN: 005646 UPC: 895452001480 One pulley can be used to change the direction of the force applied by a cord several pulleys can be used to make this simple machine. A small force on the cord can be used to lift a large weight. Experimenting with the device shows why: lifting the block by a short distance requires that the cord be pulled a long distance. This classic wooden model offers children a basic concept of the laws of physics. Desktop sized.
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