Several friends use simple rope and pulley to raise a tree house from the ground into...
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Several friends use simple rope and pulley to raise a tree house from the ground into a tree. The moss of the tree heuse is 150kg. By pulling together, the friends manage exert an everage force of 1.6 × 10²N as they raise the tree house a diatance of 3.2m above the ground. a) How much work did the friends actually do to raise the tree house? b) How much "useful" work was done? c) What is the efficiency of the rope and pulley in raising the treehouse? d) Suggest why the efficiency of this simple machine is not 100% Several friends use simple rope and pulley to raise a tree house from the ground into a tree. The moss of the tree heuse is 150kg. By pulling together, the friends manage exert an everage force of 1.6 × 10²N as they raise the tree house a diatance of 3.2m above the ground. a) How much work did the friends actually do to raise the tree house? b) How much "useful" work was done? c) What is the efficiency of the rope and pulley in raising the treehouse? d) Suggest why the efficiency of this simple machine is not 100%
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Answer rating: 100% (QA)
a To calculate the work done by the friends to raise the tree house we use the formula Work Force Distance cos Given Force 16 x 102 N Distance 32 m an... View the full answer
Related Book For
Principles Of Thermodynamics
ISBN: 9781108426091
1st Edition
Authors: Jean-Philippe Ansermet, Sylvain D. Brechet
Posted Date:
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