Answer:
the answer is well known as gravity
I think that it is apparent magnitude
Explanation:
1D motion is motion in only one direction. To put it simply, it's motion along a line. For example, a train on a straight track has 1D motion.
2D motion is motion in two directions. A good example of this is a projectile launched at an angle. It has both vertical motion and horizontal motion.
Reflection. It occurs when a wave bounces from the surface of an obstacle
