What is a scalar? A scalar is a quantity that is fully described by a magnitude only. It is described by just a single number. Some examples of scalar quantities include speed, volume, mass, temperature, power, energy, and time. What is a vector? A vector is a quantity that has both a magnitude and a direction. Vector quantities are important in the study of motion. Some examples of vector quantities include force, velocity, acceleration, displacement, and momentum.
The trajectory of a particle (in red) along a curve inside a vector field. Starting from a, the particle traces the path C along the vector field F. The dot product (green line) of its displacement vector (red arrow) and the field vector (blue arrow) defines an area under a curve, which is equivalent to the path's line integral.
Equations of Motion In my last article The definition and types of Motion were discussed. Now this is an article to better understand Equations of motion with several questions solved. Related Terms Displacement: Itis the distance moved in a specified direction. It is a vector quantity. Distance: Itis the magnitude of separation between two points. It is a scalar quantity. Speed: It is the rate of change of distance with time. It is a scalar quantity. Velocity: It is the rate of…
[The military chambers of llanberis, puddled doorway] A displacement is the shortest distance from the initial to the final position of a point P. Thus, it is the length of an IMAGINARY STRAIGHT PATH, typically distinct from the path actually travelled by P. A displacement vector represents the length and direction of this imaginary straight path.