An external agent capable of altering the state of rest or motion of a rigid body. According to Newton’s second law of motion, the force (F) required to produce an acceleration (a) in a mass (m) is given by F=ma.
See Acceleration, Balance scale task, Biomechanics, Center of mass, Centrifugal/centripetal, Dynamics, Isometric contraction, Isotonic contraction, Joule, Kinematics, Mass, Kinetics, Moment of force, Momentum, newton, Motor news, Muscle tone (or power), Musculoskeletal system, Newtonian (or classical) mechanics, Newton’s law of universal gravitation, Newton’s laws of motion, Resultant, SI unit, Torque, van der Waals forces