Public School, Deer Creek Minnesota, 1918 LakesnWoods.com Postcard and Postcard Image Collection - click image to enlarge Aerial view, Deer Creek Minnesota, 1972
Whenever work is done upon an object by an external force, there will be a change in the total mechanical energy of the object. If only internal forces are doing work (no work done by external forces), there is no change in total mechanical energy; the total mechanical energy is said to be conserved.
If you apply a net force to an object, it accelerates. The net force acting on an object is always zero if and only if it â¦ is in static equilibrium; that is, the object is not moving (rotation or translation) or moving with constant velocity.n order for the acceleration to be zero, the velocity has to be constant. If the object is at 0 velocity (not moving), the object would remain unmoving when a net force of 0 is applied to it. If the object is moving at a certain velocity, it would remain at that velocity.