The ping pong ball is the least massive (lowest in weight) of all the objects, so it takes less force to move it compared to the other objects.
false \
Distance is measured in meters
In that case, the object is said to move at constant speed.
Force • distance
work
false \
the table tennis ball
Distance is measured in meters
speed
speed
In that case, the object is said to move at constant speed.
work
Force • distance
The amount of mass of the object and other objects near by, as well as distance to the other objects.
Depth constancy refers to the ability of our visual system to perceive objects as maintaining a consistent depth regardless of changes in the viewing angle or distance. This phenomenon allows us to perceive objects with the correct depth relationships even as they move relative to our point of view.
You could use the terms mass, object, or body (that's what Newton used).
Because Earth's gravity is becoming less and less with the larger amount of distance between it and the object.