How can the law of conservation of energy be related to sports?
481524
Sports is a pretty easy way to explain physics of all sorts...  \n\nEnergy to heat (of exertion)...\n\nKinetic energy of the vaulter/gymnast being transferred into the spins, jump, landing...\n\nPotential energy meets kinteic energy: football (U.S.) linemen\n\nCircular forces (centrifugal/centrifical) / angular momentum: a speed skater around a corner\n\nEffect of friction/gravity/force on object with specific mass: skiing\n\nTransfer of kinetic energy: golf club to ball, kick to ball,\n\nKinetic meets kinetic: baseball meets bat - net sum of energy of bat in positive direction + energy if ball in negative direction = distance/height ball travels.  Same with volleyball\n\nAcceleration/deceleration of gravity: balls making arc \n\nHowever, you say you want to "analyze a problem with sports" - do you need quantitative examples or just be able to explain all the forces at work with one particular problem?
329300
It doesn't. When work is done a small amount of the system's energy is converted to entropy (heat) and is lost to the system (usually through friction).
369832
Energy is not "lost" it is converted to a form that cannot be used.\n\nDrop a ball from a certain height and the ball does not bounce back to the original height...that is because some of the energy was converted to sound (you hear the ball hitting the floor)...some was converted to heat (the ball and the spot on the floor where it hit are just a teeny bit warmer)\n\nFor the most part you can observe this "lost" energy (usually they are in the form of heat, light or sound)
765291
Conservation of energy and of momentum are different things. Momentum is always conserved in a collision. \n\nIf the collision is perfectly elastic, kinetic energy is also conserved. Billiard balls are very nearly perfect. (I guess nothing is exactly perfect in this world.)
532308
Volleyball can be related to several sciencies:\n\nPhysics - as many of the other answers talk about Newton's laws of motion and gravity.  Don't forget stuff like impact with the ball, flight dynamics, ball pressure (boyles law)\n\nMathematics - Volleyball, like many other sports, is surrounded by rules of geometry.  The playing field is a finite area, bounded by vertical planes.  How a player plays the ball will be determined by their particular skill, height, approach and respective defensive postures on the other team.\n\nSociology - Group dynamics.  How does the team work together to achieve their goal?\n\nPsychology - Personal dynamics.  How to players react to adversity?  How do they respond when things go well?  How does their attitude affect their play/others play?
641698
The total amount of energy in a closed system remains constant.\nThis, however, was found to be untrue. It was later substituted for the conservation of Mass-Energy.\nThis was also disproven. In fact, if a tiny bit of energy is "borrowed" from nothing for a really short amount of time, it can create mass according to the equation:\nE*t = h/(2*pi) = 1.06*10^-34 Js\nOf course, for our pruposes, the conservation of energy works.
1111326
the 1LOT (1st law of thermodynamics) says that neither matter nor energy are being created (new) or destroyed...that they can only change forms (ie, matter can be converted to energy and visa versa)\n\nie, there is no "overall" gain or loss of matter and energy combined\n\nwhile that law has yet to be falsified, it is far easier to convert matter to energy than it is to convert energy to matter
459656
Who said it is not freely available? Only thing is:-All the energies are governed by the Law of Conservation of Energy. According to this Law, the total available energy is constant, and energy can neither be created, nor destroyed, but one form of energy can be converted to another form. The cost involved in energy is the cost incurred in converting one form of energy into another form.
466899
Jesus. Can we not use something a bit simpler than these weird pounds, mph etc?\n\nOK, 6 pounds is 2.75 kg, let's call it 3 kg. 60 feet is about 20 metres. it does it in 1.7 seconds. That's 12m/s \n\nSo ball Kinetic Energy is .5mv^2. So .5*3*12*12 = 216 Joules\n\nA baseball weighs about .15 kg. Swapping the formula round:\n\nv= sqrt(2*216/.15)= 60 m/s for the same energy. About 216 kph, or 134mph\n\nI think....
284015
You cannot.  The law of conservation of energy states in lay language that energy can be neither created nor destroyed.  Therefore, getting more work out of a machine than is put into it is not possible.  In practical terms, even 100% efficiency, which would be getting an equal amount of work output, is not possible since some energy will always be lost due to forces such as friction.  Two terms describing the state where work output is greater than work input are "perpetual motion" and "free energy."  Unfortunately, neither one can exist.
974804
It won't work.  You can look at it this way:\n\nOne of the basic laws of physics is Conservation of Energy.  You can't create energy, nor is energy lost.  It is always constant, but it may change form.  Let me give several examples.\n\nThe energy associated with a swinging pendulum changes from kinetic (moving) energy at the bottom of the swing to potential energy at the top of the swing.  Back and forth, kinetic energy, potential energy, kinetic energy, potential energy, etc.  The swing of the pendulum does slowly die down, but that is due to the gradual transfer of kinetic energy to the surrounding air in the form of heat.\n\nIn the second example, the kinetic energy of a moving car is converted to thermal energy (heat) when you hit the brakes.  That's why your brakes get hot if you've been doing a lot of braking.  Of course, to get the car moving in the first place, the engine converts chemical energy from gasoline to thermal energy, which expands the gases in the pistons, pushing on the pistons to make the mechanical energy that turns the wheels.\n\nBack to your problem.  To charge a battery, the energy must come from somewhere.  The amount of energy coming from your voice is small, and certainly the amount of energy picked up by a microphone is much smaller, since most of the energy goes right on past the microphone.  It would take a very strong voice and a lot of talking to charge a battery, even if the charging circuit were perfect with no losses.\n\nNow, if your voice could turn a windmill.........
851241
Entropy -- the second law of thermodynamics.\n\nThis law states that in the absence of other forces, any system becomes less orderly over time.  This is because of the way energy can be converted to different forms but not lost -- most energy that gets used for work transforms into heat, which radiates into space and can't be used to do useful work ever again.  In other words, energy gets used up, and with no more energy input things fall apart into entropy, or complete disorder.\n\nBUT -- the key there is "in the absence of other forces."  We, for example, on earth have our sun which continuously supplies energy to us with which useful work can be done.  As long as there is an external supply of energy, entropy can be avoided.  Once our sun burns out, however, our solar system is indeed doomed to entropy.
114503
Law of conservation of Mass is exactly what prevents something being permenantly destroyed or created from nothing. You can't destroy Matter and you can't create Energy from nothing, Everything that exists has existed since the begining of the universe. It is possible to turn matter into energy, as shown when burning fossil fuels or making an atomic bomb
799751
The first law is energy cannot be created or destroyed, only converted from one form to another.\n\nThe second law is basically the entropy of the universe increases during any spontaneous process.  This is more easily thought of as energy moves from areas of higher energy to areas of lower energy AS LONG AS IT IS NOT PREVENTED from doing so.  In other words, energy disperses unless it's blocked.
56969
the work-energy theorem says that work is equivalent to energy.\n\nso, if you lift a 1 kg object 1 meter, you do some amount of work against gravity.  if you do the math, you'll find that the work is W = 9.8 kg*m^2/s^s.\n\nthe work-energy theorem says that this is equivalent to a change in energy, so delta_E = W = 9.8 Joules.\n\nbasically it is a simple statement of the conservation of energy, where a change in the potential energy equals the work put into the system.\n\nnote that it only applies for conservative forces, like gravity or the electrostatic repulsion.  if you are pushing something against friction, then there is an additional loss of energy to heat at the frictional surface, and the work-energy theorem does not apply.
36280
Assuming it can't be II and III, I would say it's all of the above. The potential energy is converted into kinetic - the velocity increases and the height decreases. The KE + PE remains constant, because there is no work being done because there is no force here (besides gravity). However, the first depends on how you define mechanical energy - if it's kinetic energy, it's true. If not, I really don't know what it is.
423186
Its a smaller molecule, with weaker bonds, so is broken down more quickly supplying the sportsmen with quick energy supply! I think