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- Gravitational Field, Potential and Velocity of Escape from Earth
- Gravitational Potential and Field Intensity
- Gravitational Flux and Poisson's Equation of Gravitational Field
- Application of Gauss Law
- Central Force and Reduction of Two Body into One Body Problem
- Gravitational Self Energy
- Kepler's Law of Planetary Motion

- Acceleration of an Object Rolling Down an Inclined Plane
- Equation of Motion of a Rotating Rigid Body
- Kinetic Energy of a Rigid Body
- Moment of Inertia of Solid Sphere
- Moment of Inertia of a Circular Disc
- Moment of Inertia of a Hollow Cylinder
- Moment of Inertia of a Rectangular Lamina
- Moment of Inertia of a Ring
- Moment of Inertia of a Solid Cylinder
- Moment of Inertia of a Spherical Shell
- Moment of Inertia of an Annular Disc
- Some Terminology
- Theorems in Rotational Dynamics

A conservative force is dependent only on the position of the object. If a force is conservative, it is possible to assign a numerical value for the potential at any point. When an object moves from one location to other, the force changes the potential energy of the object by an amount that does not depend on the path taken. If the force is not conservative, then defining a scalar potential is not possible, because taking different paths would lead to conflicting potential differences between the start and end points.

Gravity is an example of conservative force, while friction is an example of a non-conservative force. A force is called a conservative force if it meets any of the three equivalent conditions ie, the curl of force is zero or the net work done in a closed trajectory is zero or the force can be written as the negative gradient of potential.

Non- conservative forces can arise in classical physics due to neglected degrees of freedom or from time-dependent potentials. For instance, friction may be treated without resorting to the use of non-conservative force by considering the motion of individual molecules, however that means every molecule's motion must be considered rather than handling it through statistical methods. For macroscopic systems, the non-conservative approximation is far easier to deal with rather than millions of degrees of freedom. Examples of non conservative forces are friction and non-elastic material stress.

The potential energy function of such force, when plotted, gives a parabola.

References

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