Sitting on the table the stone has potential energy, relative to the ground, of weight times height, mgh. It has zero kinetic energy so its total energy is E = 0 + mgh. When it begins falling it loses potential energy (as it loses height) and gains kinetic energy ( as it picks up speed) so the sum stays the same as initially E = KE + PE = mgh. Just before it hits the ground all of its potential energy is gone and has been transformed into kinetic energy. So the kinetic energy at the bottom (1/2)mv^2 will equal the potential energy at the top.
a boulder falling through the air still has some potential energy, but some of its potential energy has changed to kinetic energy...so it has both potential and kinetic!
the energy in an object about to fall is potential energy then kinetic energy because when the object is not falling, it has potential energy but when it's actually falling, it has kinetic energy.
both potential and kinetic energy
If the body is freely falling, this sum will remain constant.
There is no such thing as a kinetic reaction. Any moving body has kinetic energy. When a rock falls, its gravitational potential energy is transformed to kinetic energy.
it is kinetic because it involves releasing the energy.
a boulder falling through the air still has some potential energy, but some of its potential energy has changed to kinetic energy...so it has both potential and kinetic!
potential and kinetic
A falling object.
A falling object changes from gravitational potential to kinetic.
the energy in an object about to fall is potential energy then kinetic energy because when the object is not falling, it has potential energy but when it's actually falling, it has kinetic energy.
both potential and kinetic energy
When a book is falling from a bookshelf, it is in a state of kinetic energy because it is in motion. Potential energy arises when the book is stationary on the shelf due to its height above the ground.
A rock falling of a cliff.
A falling stone.
If the body is freely falling, this sum will remain constant.
No. For example a falling stone is converting potential energy of gravitational attraction into kinetic energy, and there is no elastic energy.