The flight of a bird.
Projective motion is any motion defined in two dimensions. For example, if we mathematically project the three-dimensional path of a flying airplane onto a flat plane, the result is projective motion. The three-dimensional path was projected (thus the term) onto the flat plane..
Two-dimensional motion that is not always projectile motion would be circular motion, where an object moves in a circular path. Two-dimensional motion that is not projectile motion and does not accelerate the object could be uniform circular motion, where the speed is constant but the direction changes.
Gravity
Gravity
Circular motion is a type of two-dimensional motion that is not always projectile motion. In circular motion, such as a car driving around a curve or a satellite orbiting a planet, the object is constantly changing its direction without necessarily being launched upwards. This motion can involve acceleration due to the changes in velocity direction.
A motion along straight line is called rectilinear motion. In general, it need not be one - dimensional; it can take place in a two dimensional plane or in three dimensional space. But, it is always possible that rectilinear motion be treated as one dimensional motion, by suitably orienting axes of the coordinate system.
square and triangle
A cube the simplest and oldest example of a three dimentional image
Projective motion is any motion defined in two dimensions. For example, if we mathematically project the three-dimensional path of a flying airplane onto a flat plane, the result is projective motion. The three-dimensional path was projected (thus the term) onto the flat plane..
projectile motion.two-dimensional motion.
When two faces of a three-dimensional object intersect. Take this two-dimensional symbol for example: ^ Imagine that that carrot symbol is actually three-dimensional. The vertex is your edge.
this is an example of a model.
Two-dimensional motion that is not always projectile motion would be circular motion, where an object moves in a circular path. Two-dimensional motion that is not projectile motion and does not accelerate the object could be uniform circular motion, where the speed is constant but the direction changes.
Space is three dimensional, the three dimensions being length, width, and height. It is possible therefore to describe a motion in space in terms of a three dimensional coordinate system. However, motion also involves time, so you might want to consider a four dimensional system. That enables you to determine not only where something went, but also when, and how rapidly it went there.
Harold Hotelling has written: 'Three-dimensional manifolds of states of motion'
Gravity
a polyhedron * * * * * That is only if it is bounded by plane faces. A sphere, for example, is a three dimensional shape but is not a polyhedron: it is a solid shape.