Law of conservation energy in case of vertically upwards
Answers
If a body is thown vertically upwards, we assume that the potential energy is only due to gravitational force and we take the ground level as the reference level.
The body thrown vertically upwards with velocity ‘u’ has only kinetic energy at A and zero potential energy at A.
At point B, the body possesses both potential and kinetic energies.
and
On simplification by substituting the values we get total mechanical energy at B as the following:
As we know that the velocity at C (Maximum height) is zero its kinetic energy is also zero, so
Total mechanical energy at C as the following:
Thus from the above equations of total energies at the different positions , we can say that according to the Principle of Conservation of mechanical Energy, energy can neither be created nor destroyed, it can only be transformed from one state to another.
when an object at it higest position from ground it has maximum amt of kinetic energy .when the object starts falling there is an increase in the kinitic energy and decrease in potential energy as the speed incerases the kinetic energy also increases but the sum of the potential and the kinitic energy remains constant when it is just above the ground the kinetic energy is max and least potential energy. Pe+Ke=constant