Acceleration = velocity change / time
From newtons equations : a = (v - u) / t
Where >
a = acceleration (m/s)/s
v = final velocity
u = initial velocity
t = time interval
Also , its equal to the gradient of the slope on a time - velocity graph, with time on the x axis.
There is no answer to your question because a perpetual motion machine is impossible. If one could be built, its own motion would be considered work.
The synonym for movement could be action, motion, or mobility.
It could be called superfluous. No force is necessary to maintain motion.
Newton's F=ma is an example of a law that could explain all motion in the universe.
Inertia,
The motion picture camera helped socioety so we could record people and capture the memories of motion
You could say that its motion is uniform, meaning that its speed is constant,and that it's moving in a straight line.
you could say motionless. there is no one word for "full of motion" though. You could also say slow, fast,slower, faster, etc.
When Air is in motion it is called the wind. It Could also be called a breeze or wind current
Motion is nonzero speed, or span over time. Here within, there is net motion and gross motion, as span is directional and additive to obey the zero- identity.
Usually a pen is moved by a hand.
In a way its a memory but also it could be motion