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  2. Newton's laws of motion - Wikipedia

    en.wikipedia.org/wiki/Newton's_laws_of_motion

    The forces acting on a body add as vectors, and so the total force on a body depends upon both the magnitudes and the directions of the individual forces. [23]: 58 When the net force on a body is equal to zero, then by Newton's second law, the body does not accelerate, and it is said to be in mechanical equilibrium.

  3. Conservation law - Wikipedia

    en.wikipedia.org/wiki/Conservation_law

    The total amount of some conserved quantity in the universe could remain unchanged if an equal amount were to appear at one point A and simultaneously disappear from another separate point B. For example, an amount of energy could appear on Earth without changing the total amount in the Universe if the same amount of energy were to disappear ...

  4. Charge conservation - Wikipedia

    en.wikipedia.org/wiki/Charge_conservation

    In physics, charge conservation is the principle, of experimental nature, that the total electric charge in an isolated system never changes. [1] The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved.

  5. Electric charge - Wikipedia

    en.wikipedia.org/wiki/Electric_charge

    The total electric charge of an isolated system remains constant regardless of changes within the system itself. This law is inherent to all processes known to physics and can be derived in a local form from gauge invariance of the wave function. The conservation of charge results in the charge-current continuity equation.

  6. Net force - Wikipedia

    en.wikipedia.org/wiki/Net_force

    That force is the net force. [1] When forces act upon an object, they change its acceleration. The net force is the combined effect of all the forces on the object's acceleration, as described by Newton's second law of motion. When the net force is applied at a specific point on an object, the associated torque can be calculated.

  7. Kinetic energy - Wikipedia

    en.wikipedia.org/wiki/Kinetic_energy

    By contrast, the total kinetic energy of a system of objects cannot be reduced to zero by a suitable choice of the inertial reference frame, unless all the objects have the same velocity. In any other case, the total kinetic energy has a non-zero minimum, as no inertial reference frame can be chosen in which all the objects are stationary.

  8. How to calculate interest on a loan: Tools to make it easy

    www.aol.com/finance/calculate-interest-loan...

    You can calculate your total interest by using this formula: Principal loan amount x Interest rate x Loan term in years = Interest. For example, if you take out a five-year loan for $20,000 and ...

  9. Virial theorem - Wikipedia

    en.wikipedia.org/wiki/Virial_theorem

    Assuming that the masses are constant, G is one-half the time derivative of this moment of inertia: = = = = = = =. In turn, the time derivative of G is = = + = = = + = = + =, where m k is the mass of the k th particle, F k = ⁠ dp k / dt ⁠ is the net force on that particle, and T is the total kinetic energy of the system according to the v k ...