Point about 3) You are rounding, they are not identical, actual value (using unrounded figures) is: 57295.77893. The way I would go about it is by doing what you did in #2 and I get the same answer: 57295.7798 (exactly) Does that mean the internal force becomes infinit? This can't be correct can it? The result of the last equation is: 57 296 Newtonģ) Point A and B have both a vertical power of 57296 Newtonįirst of all is my way of thinking correct? As you can see the weight of 20N created an internal force of 57.296 Newton!!!Īnd what if alpha would have been 0. The_internal_pulling_or_pressure_inside_one_of_the_cables = 10N/cos(89,99°) This makes that in point A and B there is an vertical power-component of 10N.Ģ) 2*(cos(89,99°) * the_internal_pulling_or_pressure_inside_one_of_the_cables) = 20N The angle of the cable (alpha) as seen in the picture = 89,99° (or almost PI/2)ġ) first of all the sum of the external vertical powers should be 0. The cable is connected to a weight of 20 Newton. Next there's a cable hanging in the connection point. Let's say there is a framework of 2 equal horizontal iron pieces both are attached to opposing walls at the same height. Something is probably wrong in my way of thinking. I am stuck however on a problem I made up myself. And I can say with proud I am finally starting to get it. The device also has a power output that, when used with an optional cable, can power many hard drive devices.I have been studying Statica for the past month. This wouldn't be a horrible thing if not for the loud static buzz that erupts from the speakers when the 440FM's signal cuts out. We did notice that the entire 440FM would pop out of its socket once in a while after hitting a bumpy patch of road. In the big city, we experienced much more static, although the 440FM's signal can overpower weaker stations. While the occasional static fuzz didn't irk us, we did notice the sound quality from our iPod rated somewhere between AM and FM quality, and certainly not close to that of a CD. Away from the city, we hardly needed to change the tuner from its default 88.1MHz setting and received clear, if not sonically pristine, audio signals. Our tests results varied depending on our proximity to urban areas where there are dozens of active FM stations (the device has a range of from 10 feet to 30 feet). The stretchy cable ensures that backseat DJs can still have their say. So we're back to FM transmission, and while there are many models available, we're particularly impressed with iRock's $30 Beamit 440FM for in-car use.Ī thin, coiled cable stretches from the bottom of the unit and can plug into any device with an audio-out headphone jack, including the iPod, a CD player, or even a portable synthesizer. And most stereos that ship with automobiles today lack stereo RCA inputs, the preferred method of attaching a portable for the cleanest-sounding audio. Many owners of the iPod and other portable audio devices drive cars without cassette decks, so they can't use the affordable and effective cassette adapter (although some well-designed vehicles such as BMWs have an iPod dock built into the dash itself). While we at CNET aren't the world's biggest fans of FM transmitters, we also know that sometimes you don't have a choice. IRock Beamit 440FM wireless music adapter
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