Two displacement vectors ( P ) and ( Q ) are represented from a common point (O )…
PHYSICS · Multi-part · CBSE · Physics · Motion in a Plane · Motion in a Plane
Problem
Two displacement vectors P and Q are represented from a common point O such that ∣P∣=4m, ∣Q∣=3m and the angle between them is 60∘. A student chooses the scale 1cm≡1m to work on plain paper.
(i) Define vector addition in the context of physical quantities.
(ii) Describe, with neat labelled sketches, two different graphical constructions by which the student can obtain the resultant of P and Q. No actual measurement of the resultant is required.
(iii) Give a qualitative explanation for why both constructions in part (ii) lead to exactly the same resultant vector.