Recent content by Hanababa

...Does not help me much, am really confused, but thanks anyways

What other parameter(s) do we need to mention in order to get a solution ?

I am away from school since a long time. The value I put for M,R and V are fictive, I just would like to know how to calculate it.

Thanks for your clarifications. I however would like to understand what is wrong:frown:. 1. Is it a mistake to think that the device described is able to generate electrical power ? After all, it is very similar to a wind turbine system. 2. Is it a mistake to think that the characteristic...

Exactly, 1 J = 1watt.second This is the reason I am confused. As we speak about an electric power generator, we need a result in watt , not in watt.second Can someone clarify ..? Truly Appreciate it

A mass M is at the top of a rotative arm, with a radius R, at a certain speed V. Lets take M=60kg, R=5meters and V=10m/s. We assume the movement generated from some kind of natural source (wind, water..), is permanent and constant, and there is no loss (100% efficiency). How many watt of...

Thanks again, does it mean that if the device is operating for 1 year, so the value W in watt would be K = W * 365*24*3600 K = W * 31536000 So, about 31,5 Megawatt of electrical production per year ?

Right, so K = 1/2 * M * R² * (w)² with w = V/R K = 1/2 * M * R² * (V/R)² K = 1/2 * 60 * 5² * (10/5)² K = 3000 Joule ?? It must be wrong because on the above formula, we see that the R² are cancelling themselves, which would mean that R is not relevant, cannot be. Sorry, I am a bit lost..

Huygens-Steiner theorem: I parallele(moment of inertia) = I(cm) + MR² Then, K (the rotational energy) is K = 1/2 * I parallele * V² So, K = 1/2 * (Icm + MR²) * V² So remaining questions are: 1. how do you get Icm ? 2. As an energy K should be in Joule, which is a watt.second. I need a result...

An object with a mass M is rotating around an axis, with an arm of radius R at a certain speed V. Assuming that the movement is constant, and a 100% efficiency, how many watt of electrical power can this device generate ? For example purpose, we can take M=60 kg, R=5 meters and V=10 meters...

An object with a mass M is rotating around an axis, with an arm of radius R at a certain speed V. Assuming that the movement is constant, and a 100% efficiency, how many watt of electrical power can this device generate ? For example purpose, we can take M=60 kg, R=5 meters and V=10 meters per...