Posted by admin | Posted in Uncategorized | Posted on 08-02-2005
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Rope Circle
a 0.98 kg rock is attatched to a 0.40 m rope and spun in a vertical circle. What is the speed of the rock?
The tension of the rope when the rock is at the top of the swing is 79.0 n (down)
post your question to physicsforums.com. there is far better chance of it being answered since lot of physics people visit there.but make sure you show your attempt at solution. if you just ask people to provide you with answers, they will not answer. you should first show your own attempt then people are more than willing to help you learn physics. its a great forum and people are very friendly.many are professors of physics……….they even have latex typesetting which helps you to write various physics equations as they appear in print.
Rope Circle
Are Crop Circles Hoaxes Or Other-Worldy Phenomena?
Crop circles gripped the imagination, attention and interest of the world ever since the earliest circular formations discovered in the 1960′s. The scientific association, the media, and the New Age believers almost always showed some interest in the appearance of new crop formations. The M. Night Shyamalan movie Signs, which starred Mel Gibson and Joaquin Phoenix, and many other fictional works used crop formations as a main feature in their subject matter.
A crop circle design is created when a field of rapeseed, rye, wheat, corn or barley is flattened into what usually appears to be a pattern of circles and/or some other geometric shape. The earliest field formations consisted of simple circles, but the designs generally evolved into more and more complex patterns ever since, with some designs becoming a highly involved triple Julia set or even with some formations exhibiting three-dimensional qualities. The patterns found in sacred geometry can often be found in crop formations.
Serious investigators of the crop formation phenomenon, regardless of how basic or involved the patterns are, often wonder whether they are the result of simply being man-made (most likely), an effect of freakish weather, or something of otherworldly or paranormal in origin.
The History of the Crop Circles
Records of crop circle formations date back as far as the 1880′s in England. According to these early records, crop circles were thought to be caused by freak storms that created round impressions in the cultivated fields.
There has been little interest in crop formations and little written about them until almost a century later. Crop formations again attracted more interest in the press when more sightings were reported in the 1960′s. Crop designs did not just appear in England, they also occurred in many places all across the globe such as in Australia, Canada, China, Japan, and Russia. Areas and locations considered to be ancient, sacred and holy were often near the formations of crop circles. Most crop circles were discovered in the southern portion of England, mostly in the area of Wiltshire County.
Multiple explanations were created regarding the formation of crop circles. One theory stated that crop formations were the effect of strange weather such as whirlwinds and tornadoes. Another concept joined or linked crop circles to disc-shaped UFO’s and otherworldly beings such as aliens.
The mystery behind most of the crop formation phenomena was destroyed when two pranksters by the name of Dave Chorley and Doug Bower claimed to have created most of the crop circles in Wiltshire County themselves using planks, rope and other locally found tools under cover of the darkest hours of the night.
Some Crop Formations Still Defy Explanation
After the time that Dave Chorley and Doug Bower came forward claiming that they created the crop circles that appeared on the fields of Wiltshire County, later research revealed that eighty per-cent of all documented crop formations are of human origin. However, a twenty per-cent of carefully recorded and researched crop formations had no indication of being created by human hands and therefore still had no “earthly” explanation. What then could be causing the unexplained twenty per-cent?
Many paranormal researchers and scientists were forced to conclude that the remaining unexplained group of crop formations had to have other explanations for their occurrences. Experts decided on the creation of “cereology” as a serious area of research to help solve the problem of finding out the actual truth behind the formation of the most genuine field designs.
Crop Formations That Are Well-Known
The following are a few highlights of various significant circular formations that appeared after the 1960′s:
* The solar system formation, discovered in Longwood Warren, Hampshire, UK. With a similarity to the planets of the inner solar system and an obvious absence of the planet Earth, this formation attracted much interest to scholars and scientists alike.
* The dumbbell formation, first discovered in Chilcomb Farm in UK. Assumed to be the first of the dumbbell formations, where two circles were connected by a line and flanked with two rectangles at each side. Formed in 1990.
* The Barbury Castle tetrahedron. Barbury Castle is a Neolithic fort in the United Kingdom. Because it depicted one of the sacred hermetic symbols, the symbol of the Trinity, it was considered highly significant. This tetrahedron design appeared in the fields near Barbury Castle in 1991.
* The “Tree of Life” formation. Another Barbury Castle configuration that appeared in May of 1997.
Crop Formations and Sacred Geometry
There is an obvious connection between crop formations and sacred geometry. Sacred geometry is an aspect of geometry for the purpose of communicating an eternal truth, expanding consciousness and spiritual awareness. There is also a sense of balance, centeredness and well-being that comes from the sheer beauty and elegance of the sacred geometry often used in the design of a crop formation. Sacred geometry carries its own meaning and message whether it be created by extraterrestrial artists from a higher realm, or as in the vast majority of cases, simply stomped-out by Earth-bound human designers. Many sacred jewelry designs are based on crop circles or on sacred symbols often found in crop circle formations.
More information and videos related to this article can be found here: http://www.Sacred-Geometry-Jewelry.com/
About the Author
I am a spiritual truth seeker looking for wholeness, or the perfect inner joy and abundant health that we all long for. I have found much of that wholeness through ionized water fasting, afterlife research, advanced dieting/nutritional supplementation, meditation, and transmutation of the lower chakra energies into a higher expression of joy and love.
How do you find tension in a rope that is spinning?
So, there is a ball that has 0.5kg and it tied to a string and the string is spinning with constant motion of 2m/s, it is spinning around in a circle with radius of 20cm on a surface with no friction. how do you determine the tension?
Fr= mv²/R
Fr=0.5*2²/0.2
Fr=2/0.2 = 10N
Where in Fr is the resultant force by Newton’s law… and m*v²/2 is the centripetal force
The string is attached to that ball and the resultant of forces is the centripetal because it is in equilibrium (dynamic).
So the tension is 10N.
Everyday Gold by Michael Anthony 14K Rope Circle Pendant
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