Physics, 08.03.2021 19:30 rissaroo159
In 2014, physicists from FOM Foundation at the University of Amsterdam introduced a new hypothesis of how the Pyramids at Giza were built. The group of physicists suggestedthat ancient Egyptians wetted sand in an effort toreduce friction and then pulled the 3000 kg stoneblocks to their final resting place. 15 men couldmove a block at a rate of 0.5m/sby pulling a largerope angled at 30owith respect to the plane anda tension of 7,200 N.
Required:
a. What is net work done on block?
b. What is speed of blck after it moved .25m?
c. What is work done by block if kinetic friction coefficient is 0.3?
d. What is net work including friction?
Answers: 3
![0.3[(3000\times 9.8)-(7200\times 0.5)]](/tpl/images/1177/5205/e0a1f.png)
![0.3[29400-3600]](/tpl/images/1177/5205/8e52b.png)
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In 2014, physicists from FOM Foundation at the University of Amsterdam introduced a new hypothesis o...
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