Any influence that tends to change the state of rest or the uniform motion in a straight line of a body. The action of an unbalanced or resultant force results in the acceleration of a body in the direction of action of the force, or it may, if the body is unable to move freely, result in its deformation (see Hooke's law). Force is a vector quantity, possessing both magnitude and direction; its si unit is the newton.
According to Newton’s second law of motion the magnitude of a resultant force is equal to the rate of change of momentum of the body on which it acts; the force F producing an acceleration a m s-2 on a body of mass m kilograms is therefore given by: F = ma See also Newton’s laws of motion.
1. Physical energy or intensity:; SYN. forcefulness, strength.
2. The physical influence that produces a change in a physical quantity
3. A powerful effect or influence:
4. Group of people willing to obey orders; SYN. personnel.
5. A group of people having the power of effective action + prikaži više

ETYM Latin fortitudo, from fortis strong. Related to Fort.
Strength of mind that enables one to endure adversity with courage.

Strength; resistance to the elements or to hardship.

The quality of hearty sincerity; SYN. wholeheartedness.

Enduring strength and energy; SYN. staying power, toughness.

ETYM Old Eng. vigour, vigor, Old Fren. vigor, vigur, vigour, French vigueur, from Latin vigor, from vigere to be lively or strong. Related to Vegetable, Vigil.
(Alternate spelling: vigour).
Active strength of body or mind; SYN. vigour.

Alternate (chiefly British) spelling for vigor.

ETYM Latin, accusative of vis strength.
Power; force; energy; spirit; activity; vigor.

ETYM Latin vitalitas: cf. French vitalité.
An energetic style; SYN. verve.