A vector quantity is fully described by its magnitude, unit, and direction, e.g.
You are watching: Is distance a vector or scalar
Distance and also Displacement
Distance is a scalar quantity. It procedures the total distance travelled, no matter in which direction.
Displacement is a vector quantity. It is the length measured from the beginning point to the finishing suggest in a right line. The direction should be stated.
A girl go 3 kilometres due north then turns and walks 4 km due east as presented in the diagram.
(a) The total distance travelled(b) The girl’s final displacement loved one to her beginning position.
(a) Total distance = 3 kilometres + 4 km = 7 km
(b) (to calculate displacement, we require to attract a vector diagram)
(this solution requires using Phythagoras and trig features (SOH-CAH=TOA), yet you can additionally solve these species of difficulties using a scale diagram).
Speed and Velocity
Speed is a scalar quantity. As disputed above, speed is the distance travelled per unit time.
Velocity is a vector quantity (the vector indistinguishable of speed). Velocity is characterized as the displacement per unit time.
Since velocity is a vector, you must state its direction.
The direction of velocity will be the very same as the displacement.
The girl’s go in the previous example took 2.5 hours.
See more: Danyang–Kunshan Grand Bridge Map, World'S Longest
(a) The typical speed(b) The average velocity because that the walk, both in km/h
(b) Displacement = 5 km (053˚) Time = 2.5 hours
(When performing calculations on speed and also velocity prefer the above, it is finest to compose the equations in words as shown, to protect against confusion with symbols. This communicates your expertise in the clearest way).
Leave a reply Cancel reply
Your email deal with will no be published. Required areas are significant *