Well,i think you will say that accelerating can cause Object to experience no mass.So the distinction you are telling is acceleration can create no much displacement but constant velocity makes more displacement. Well,i Don't think that is the actual cause...
I am explaining the difference between inertial and relativistic mass.
For the explanation of inertial mass there are no nearby massive objects besides the object under discussion itself. As the object accelerates with respect to the state of the aether in which it exists the greater the displacement of the aether the greater the displaced aether pushes back and exerts inward pressure toward the object. Inertial mass is the objects resistance to acceleration. What I am discussing is what causes that resistance.
'An Extended Dynamical Equation of Motion, Phase Dependency and Inertial Backreaction'
http://arxiv.org/abs/1208.3458
"We hypothesize that space itself resists such surges according to a kind of induction law (related to inertia); additionally, we provide further evidence of the “fluidic” nature of space itself."
The aether is, or behaves similar to, a superfluid with properties of a solid, a supersolid, which is described in the article as the 'fluidic' nature of space itself. The 'inertial back-reaction' described in the article is the displaced aether pushing back and exerting inward pressure toward the object.
For the explanation of relativistic mass there are no nearby massive objects besides the object under discussion itself. For relativistic mass we are discussing how the change in the state of displacement of the aether connected to and neighboring the object changes the relativistic mass of the object as the object moves faster with constant velocity with respect to the stte of the aether in which it exists.
Well,Now explain time dilation and contraction of object's itself when it moves faster in terms of aether...
Everything is with respect to the state of the aether in which it exists, including the rate at which atomic clocks tick. You have an atomic clock at sea level. You take it to the top of a mountain. The atomic clock ticks at a different rate because the state of the aether in which it exists has change.
Lorentz length contraction was in regards to an absolutely statoinary space objects moves through. The aether is not an absolutely stationary space. Aether is displaced by matter. The faster an object moves with respect to the state of the aether in which it exists the greater the displaced aether pushes back and exerts inward pressure toward the object so there may be some contraction. However, it is nothing close to as formalized by Lorentz length contraction.