direct motion

Direct motion, also known as prograde motion, is the normal direction of orbital motion and axial rotation of bodies in the Solar System; the opposite direction is retrograde. Objects with direct motion have an orbital or axial inclination less than 90°.

Melodic motion is the quality of movement of a melody, including nearness or farness of successive pitches or notes in a melody. This may be described as conjunct or disjunct, stepwise, skipwise or no movement, respectively. See also contrapuntal motion.

In traditional four-part harmony, it is important that lines maintain their independence, an effect which can be achieved by the judicious use of the four types of contrapuntal motion: parallel motion, similar motion, contrary motion, and oblique motion.

Contrary motion, unlike similar and parallel motion, is when one melody ascends and the other melody descends – each melody moves in the opposite direction of the other.

The direction of rotation can be clockwise or counterclockwise. Clockwise rotation follows the same direction as the hands of a clock (↻). ( ↻ ) . Counterclockwise rotation follows the direction opposite to the hands of a clock (↺).

Kenny: Directed motion and random motion are two separate things. In directed motion you can use Newton's Laws to describe the motion of individual objects, but when objects exhibit random motion they are equally likely to move in any direction.

A motion is when the position of an object changes over a certain period of time. There can be various types of motion including oscillatory, rotational, transactional, uniform, non-uniform, periodic, circular and linear.

'Motion in Music' is a study of movement and time through musical interpretation. It looks at ways in which motion, both physical and conceptual, is featured in the musical performance and it is, therefore, written with the performance of music in mind.

According to the nature of the movement, motion is classified into three types as follows:

• Linear Motion.
• Rotary Motion.
• Oscillatory Motion.

Types of Motion

• Linear Motion. In linear motion, the object moves from one position to another in either a curved direction or a straight line.
• Rotary Motion. Rotary motion is a sort of motion in which the object moves in a circle.
• Oscillatory Motion.
• Periodic Motion.

There can be various types of motion including oscillatory, rotational, transactional, uniform, non-uniform, periodic, circular and linear.

Rotation: When the planet earth spins on its axis, it is called rotation. It rotates counterclockwise or west to east when viewed from the North Pole. Revolution: When the planet earth moves around the Sun in a fixed orbit or path, it is called revolution. At this time, the earth is also performing a rotation.