Why is potential energy shown in its formula as twice the kinetic energy.?
99416
Potential energy is the sum total of all the energy that CAN BE derived.  Think of it as stored energy waiting to be released.\n\nKinetic energy is the total energy being derived at some instant in time. Unlike potential energy, kinetic energy is determined by mass AND velocity.
247664
It's at the apex of the circle.\n\nThe total energy of the system is the sum of the kinetic energy, 1/2 mv^2, and the potential energy, mgh (where h is the height above the circle's lowest point).  At the bottom of the circle, all the energy is kinetic and the speed is highest; at the top, some of this energy has been stored as potential energy, according to this:\n\n1/2 m (v_bottom)^2 + 2mgr = 1/2 m (v_top)^2 \n\nThe actual value of the velocity is undetermined, as v_bottom can be as fast as you like.\n\n>>>EDIT:\n\nPoster above is completely right.  Whoops :)  That'll teach me to do this on scraps of paper at work...
211921
Potential energy is the energy by virtue of its position.\nAny object which is far away from the center ofpossessingf nothing prevents it will move towards the center of earth. A spring wound fully  or partially. If left alone and it will rewind to its normal position.A  vessel containing gas under high pressure.If there is a vent the pressure will drop to normal.A string under tension. All thesrelievedamples of potential energy. These energies will be releived from the object when  there is proper way. \n\nKinetic energy is the energy by virtue of its motion. Any object moving in other words having velocity is possesing kinetic energy.If the velocity is reduced by some external agency the latter gets energy and viceversa.
649603
To say its an equation involving the relation between energy possesed by a mass
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
951555
the exact form of the equation i am not getting but dimensionally the equation is wrong because kgm/s is not equal to n/m2
573522
kinetic energy is 1/2 mv² so it depends on mass and velocity
72436
Kinetic Energy = 0.5 * mass * velocity^2\n\nKinetic Energy = 0.5 * 4000kg * (3m/s)^2\n\nKinetic Energy = 18,000 Joules
916458
Kinetic energy is energy in motion and potential energy is energy at rest.
865501
This is letting spring energy = gravitational potential energy.\n\nkx²/2 = mgh→ k = 2mgh/x² = 2*1*9.8*.6/.02² = 29400 N/m
809675
Force times distance is not kinetic energy. Force times distance is work. Work can appear in different forms. If you expend 100 Newton-meters of work pushing a dog very slowly up a frictionless inclined plane, the dog will have 100 Newton-meters of potential energy when you are done, and no kinetic energy, for it will stop moving when you stop pushing.\n\nOn the other hand, if you expend 100 Newton-meters of work pushing the dog along a horizontal frictionless slippy-slide, the dog will continue sliding after you stop. It will have no potential energy and 100 Newton-meters of kinetic energy.\n\nDo you want to know how fast the dog will be going when you stop pushing? Use\n\nE = (1/2) * m *  v^2
688944
View source of the that page.\nYou will see the formulas.
149886
Hope this helps,  first remember that energy must be conserved so E initial will equal E final so you use the equations for potential and kinetic energy.  mgh for potential and 1/2mv^2 for kinetic.  You know the initial velocity, gravity and the height of the ramp so you simply break it into components and get the answer of 3.15 m/s.  HOpe this helps
962133
E potential = mgh\n= 4 kg ( 9.81 m/s^2) ( 2.5)\n=98.1\n\nPotential energy was not lost....it transformed into Kinetic Energy\n\nKinetic + Potential = Total Energy\n\nLaw of Conservation of Energy
28535
Well, look at the units. The first one is a distance divided by a time; speed. The second one is in the units of energy (in the MKS unit system) the Joule. The "KE" also says to me that it isn't just any energy but, kinetic energy -- the energy that something has because it is moving.\n\nFrom these two bits of information you can deduce the mass of the object (if that's what you're talking about) in question.\n\nA very basic kinematic equation is the one that describes the relationship between the mass, velocity, and kinetic energy of something in motion.\n\nKE = 1/2 * mass * velocity^2\n\nsolving for the mass would be:\n\nmass = (2*KE)/(v^2)\n\nWhich is in the neighborhood of 2000 kg.\n\nhope that helps.
802951
Kinetic energy is energy due to motion and potential energy is energy due to position in a force field.  The formula for translational kinetic energy is KE = 0.5*m*v^2, where m is mass and v is velocity.  The most common type of potential energy is gravitational potential energy, and near the surface of the Earth (or some other planetary body) the formula is PE = mgh, where m is mass, g is acceleration due to gravity, and h is the height above the surface.  Another common one is elastic potential energy in a compressed spring.  In that case the formula is PE = 0.5*k*x^2, where k is the spring constant and x is the compression.  An object can also have electrical potential energy, if it has an electrical charge and is positioned some distance from another charge.
634337
Eric L is right. Kinetic energy is proportional to speed SQUARED. It is momentum that is linearly proportional to speed.