Frequently associated with a projectile like a bullet or a missle. V Vector A quantity having both magnitude and direction. The direction may be expressed as an angle from a single axis in two dimensions. In three dimensions, the direction must be a pair of angles measured from different axes. The speed of an object in a given direction.
Velocity is a vector quantity.
The distance covered by a travelling wave in one period . It is the distance between points of the same phase angle in a travelling wave. For example the distance between peaks, or the distance between valleys of a wave train. The wavelength is frequently symbolized by the Greek letter lambda l . Work Work is defined as the application of force over some displacement .