Question

If a ball is falls at a height of x cm then find the kinetic & potential energy reached to the ground . Also finds how much energy is conserved ..? (If the cheaters r written this answer by the help of internet, i can report there answer, so.don't try to cheat mee..).

Answer 1

Hope this will help u
Energy is conserved if internal forces are conservative and external forces do no work..here gravity is conservative force so here energy is conserved

Answer 2

When a ball falls freely under the influence of gravity, its initial potential energy (it has PE due to the height) gets converted into kinetic energy (or velocity).

If there is no friction or buoyancy force in the air (assumption), all the potential energy will be converted into kinetic energy. So all the energy is conserved.

1/2 m v² = kinetic energy just before hitting the ground
      m = mass,  v = speed
m g x = potential energy
    g = acceleration due to gravity of Earth
    x = height above the ground

conservation of energy:     1/2 m v² = m g x.