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If an object is on a shelf would its potential energy equal zero because its rate of gravity equals zero?
Wiki User
∙ 14y ago
Not sure what you mean by 'rate of gravity'. All objects with mass are attracted to the Earth's centre by a force proportional to the mass of the object. The constant called the gravitational constant produces a downward acceleration of any free falling object of 9.81 meters/sec2, called G. The force on the object is equal to its mass M times G, ie MG Newtons. Now energy equals (force x distance) so if you raise an object H meters, the energy used to do this is MG x H Joules. This then becomes its Potential Energy, potential because this energy is available to do work if the object is allowed to fall. So the object on the shelf has potential energy, the amount being dependent on how far it is going to fall if the shelf is suddenly removed. Obviously potential energy is relative to the level of the observer or the base line.
Wiki User
∙ 14y ago
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What energy occur as a pendulum swings?
There is Mechanical Energy. This Mechanical Energy equals Potential + Kinetic Energies. At the maximum heigh and with the pendulum set still there is the maximum Potential Energy (so Kinetic equals 0, and Potential Energy equals Mechanical Energy). When we release the pendulum this Potential Energy transforms into Kinetic Energy which will be maximum and equal to the Mechanical Energy when the 'rope' or 'string' that holds the pendulum is in the same direction as the acceleration, or force, in this case gravity. Then, and if there is no friction (e.g. air) the pendulum will reach the same maximum heigh that it had in X0 and the Kinetic Energy will transform into Potential, reinitiating the process but in the opposite direction. Hope i helped and sorry for my english. :)
What is FG equals mc2d?
force . gravity = energy . distance
What does kind of energy does a skier traveling downhill have?
Half way down the slope, the skier has kinetic energy and potential energy. At the top of the slope, before he starts moving, he only has potential energy. At the bottom of the slope, he has only kinetic energy. This is an extremely simplified explanation, but it's probably the answer that your teacher is looking for. Hope that helps.
What is Ep equals mgh?
Potential Energy = mass x gravitational acceleration x height
What are two types of mechanical energy?
The traditional definitions are kinetic energy (due to motion) and potential energy (due to the relative location within a gravity field).There is really only one type and it is the sum of the gravitational potential energy and the kinetic energy. Mechanical energy = (Mass)((Gravitational acceleration)(Height)+(1/2)(Velocity)²)
What does the letters stand for in this formula PE equals mgh?
PE=MGH means the potential energy equals to the mass times the gravity times the height
What is the mass of a man who has a gravitational potential energy of U equals 5111 J at a height of h equals 4.72 m above the ground?
For this and similar questions, use the formula PE = mgh (potential energy = mass x gravity x height). If mass is in kilograms, gravity is 9.8 meters/sec2, and height is in meters, then the energy is in Joule.
What does potential energy plus gravitational energy equals?
Gravitational-potential energy.
Why can an object have kinetic energy and potential energy?
Because they are not mutually exclusive. Take for example a falling object; while falling at a given velocity it has (.5)(mass)(velocity)2=Kinetic Energy but also has the potential energy of whatever distance it has yet to fall, which equals (mass)(gravity)(height)=Potential Energy These two types of energy equal the Total Energy of the falling object, which never changes as it falls.
What energy occur as a pendulum swings?
There is Mechanical Energy. This Mechanical Energy equals Potential + Kinetic Energies. At the maximum heigh and with the pendulum set still there is the maximum Potential Energy (so Kinetic equals 0, and Potential Energy equals Mechanical Energy). When we release the pendulum this Potential Energy transforms into Kinetic Energy which will be maximum and equal to the Mechanical Energy when the 'rope' or 'string' that holds the pendulum is in the same direction as the acceleration, or force, in this case gravity. Then, and if there is no friction (e.g. air) the pendulum will reach the same maximum heigh that it had in X0 and the Kinetic Energy will transform into Potential, reinitiating the process but in the opposite direction. Hope i helped and sorry for my english. :)
What is a planes potential energy at 30m if the 9kg model plane flies horizontally at a constant speed?
Potential energy is due to its position relative to Earth. Energy equals to force times distance; figure mass times acceleration due to gravity equals force (close enough). The horizontal aspects of motion are irrelevant in this problem.
What is kinetic energy plus potential?
It equals basic energy
Kinetic energy divided by potential energy equals?
1
What does pe equals mgh stand for when you are talking about energy?
Potential Energy
Where on a roller coaster is potential energy at the highest?
Potential energy is highest at the dead top of the highest point on the roller coaster. It is lowest at the lowest point. Kinetic energy (motion energy) is highest at the point where the velocity is highest. This depends on the design. A good guess is dead bottom of the longest fall, but on a complex coaster ride there are other possibilities. Also, air resistance and friction can change this.
What is Ep equals m x g x h?
Ep is potential energy of a mass, m ,in gravity field, g ,at height of h above a reference ground
What is FG equals mc2d?
force . gravity = energy . distance
