Principle of Conservation of Energy
Total energy of an isolated system always remains constant. Since, the universe as a whole may be viewed as an isolated system, total energy of the universe is constant. If one part of the universe loses energy, then other part must gain an equal amount of energy. The principle of conservation of energy cannot be proved as such. However, no violation of this principle has been observed.
In the given curved road, if particle is released from A, then
Options:
(a) kinetic energy at 8 must be mgh
(b) kinetic energy at 8 must be zero
(c) kinetic energy at 8 must be less than mgh
(d) kinetic energy at 8 must not be equal to potential energy