Working out at about 60% to 75% of your maximum heart rate (the so-called fat-burning zone) burns fewer calories than working out at 75% to 85% of your maximum heart rate (the so-called aerobic or cardio zone).
In physics, motion is a change in position of an object with respect to time. Motion is typically described in terms of displacement, distance (scalar) , velocity, acceleration, time and speed.
Definition of mechanics. 1  1 : a branch of physical science that deals with energy and forces and their effect on bodies. 2  2 : the practical application of mechanics to the design, construction, or operation of machines or tools. 3  3 : mechanical or functional details or procedure the mechanics of the brain.