if law of conservation of energy is  true ..what happens to the mechanical energy of freely rotating shaft .??
930423
All energy eventually ends up as heat.  It's a consequence of the second law of thermodynamics
376365
Energy can not be created or destroyed, it just changes into a different form.  Usually sound waves mechanically vibrate objects, sometimes transferring the energy into kinetic energy, sometimes it is reflected or absorbed and ultimately results in heat, which is a form of mechanical vibration.
991586
No energy is required. Following Newtons first law of motion, a body (such as the Earth) will continue moving until a resultant force causes it to stop. In space there is no atmosphere, so the Earth just keeps flying around.
548136
only energy is transferred.  Think about it - if you're in the  ocean and a wave comes by, you bob up and down but aren't swept away.
850621
In the same manner as a turbine with a horizontal one, by the water moving the blades. its tha rotation that generates the power. The alignment of the shaft doesn't matter, its the force transferred to the generator/alternator that matters.\n\nThere shouln't be any significant change in the turbine blades.\n\nIt may be easier in certain designs to couple the generator set to the shaft if its mounted vertcially in some locations.
243705
1. Energy cannot be created or destroyed only changed in form. 2. The total energy of any closed system is = 0\n\nA static generator does not create energy it only changes its form from mechanical to electrical.  Search on the web for perpetual motion for a more in depth explanation.\nalso search thermodynamics, first and second laws.
515678
The conservation law states that energy is neither created nor destroyed but merely changes type. So, when an object slows down it has less kinetic energy and that energy is converted to heat by way of friction.
323062
Rotational mechanics is a huge field and this space wouldn't be enough to explain it. Neverthless you can see this site for the topics it contains: http://www.batesville.k12.in.us/physics/phynet/Mechanics/RotMechanics/Rotate_Mech_Intro.html\n\nIf you want to know a specific think about Rotational Mechanics then ask that. If you don't know anything about it, then I suggest you buy a book and read about it.
818883
Es = L*r*w (w=2piN) , N=600 rpm=10rps , L=9 \nEs = L*r*2pi*N) , N=10, L=9 \nEs = 9*0.18*2*3.14*10\nEs (Shaft Energy)= 101.734 Newton/second which is not a unit of power.\n\nPlease specify the units of r,Es,L=95 or 9 ?\nWhat is the unit of Ee? HP or KW?\nfurther you have given following data which are contradictory.\nPump Shaft Speed =1200 ?\nEe (Electrical Energy) = 67.2\nT = 1.62\nw (Rotational Speed)= 62.8
253742
Please take the time to\nvote for the best answer\n\nThank You!!\n\nRecall that an object of a certain mass moving with particular speed will have an associated kinetic energy  mass x speed2. An object spinning about an axis will also have associated with it a kinetic energy, composed of the kinetic energies of each individual part of the object. These individual contributions may be summed up to give an expression for the total kinetic energy of the spinning object: \n\nLook this up for more
905049
First assume that we neglecting any losses from air resistance or internal friction.\n\nWith that simplification, imagine two states:\n1) you are on the bridge 100m above the water and at rest\n2) you are suspended by the spring at its point of maximum extension, and therefore with zero velocity\n\nSince we assumed that there were no losses, the energy of both of these states is equal. Where is that energy located?\n -->1: your gravitational potential energy (no kinetic energy, no stored elastic energy)\n--> 2: your remaining gravitational potential energy, and the stored elastic energy in the spring (by definition, no kinetic energy)\n\nSo what has happened is that the spring has stored elastic potential energy that is equal to your loss of gravitiational potential energy. That's the only way the energies of the two states are the same.\n\nNow you can set up some equations. Let's say that you start at height H0 and end up at height H1.\n\nchange in PEg= m * g * (H1-H0)\nchange in PEk = 1/2 * k * [(H1-H0)-30m]^2\nwhere we have accounted for the 30m long unstretched length of the spring.\n\nNow by observing that -PEg = PEk, and plugging in the given values for m and k and the known value for g, you can readily solve for the change in height (H1-H0) (it should be < 0) It's a quadratic, so you expect to find one answer that is not physically realizable - reject that one, and select the other one.\n\nDoes that help?
915353
To answer your question simply and directly; yes. An object's motional energy loss is proportional to itself; it's a result of the forces of gravity acting directly on objects based on their respective masses and distances.\n\nAs the stone goes up in the air, it loses kinetic energy due to the pull of gravity -- it decelerates until it stops moving upward, then begins moving downward. \n\nThe second you let go of the rock, its acceleration is constant; its kinetic energy decreases as it slows down and then increases again as it falls to earth.\n\nThe kinetic energy of the rock turns into potential energy as it gets higher; kinetic energy being equal to one-half the rock's mass times its velocity squared, and potential energy being the rock's mass times the rock's height above ground times the constant acceleration due to gravity.\n\nIn a vacuum, all the rock's kinetic and potential energy would add up to the same value at any point in its rise and fall; if you threw it hard enough to give it, say, a hundred kilojoules of kinetic energy, when it reached the top of its trajectory and began to fall down, it would have zero kinetic energy but a hundred kilojoules of potential energy. On earth, it wouldn't work like that; some small amount of energy would be lost due to wind resistance, etc.
76279
dont see why not. just some simple energy conversions. theoretically it would work, but maybe slow down due to energy lost as heat due to friction and such... but it should work.
638982
The kinetic energy changes proportionately to the dot product of the force and the direction of motion.  If the object is always moving at right angles to the force, there is no change in kinetic energy.\n\nThe most obvious example is a planet in a circular orbit around a star.  The star exerts a constant force on the planet, but the planet's kinetic energy never changes because the force is always perpendicular to the direction of motion.\n\nThis is a case where a non-zero net force results in no change in kinetic energy.
223530
How about the adding of Gravitational Potential Energy (GPE) and Kinetic Energy (KE) as an object falls in the air to demonstrate the preservation of energy?\n\nBefore it falls all energy is GPE, as it falls GPE is converted to KE until just before it hits the floor then it is all KE.
1143514
Many forms of energy exist around us. Energy cannot be created or destroyed, only changed from one form to another. If a person ever says that energy is lost, what really happens is that energy is spent or changed into different forms. It never really is lost. For example, if you use water energy to create mechanical energy, you might "lose" some energy by creating heat energy in the form of friction.
832834
d)\notherwise some of work transforms to heat which is potential energy not kinetic.\nfor example when you kick the wall, acting forces are not elastic and do not rise kinetic energy of your feet or wall.