Question

if a body free fall from height h from the earth surface then prove that in each case the mechanical energy is conserved

Answer 1

when the obiect is fall down from the specific height from the ground

when the object is placed at height, the object is push down from the height , the kinetic and potentinal energy is produced

MECHANICAL ENERGY=POTENTINAL ENERGY + KINETIC ENERGY

from the surface of the earth the body is produced the mechanical energy is produced