Question

Questions no. 19 please solve tomorrow is my test

Answer 1

considering that the average velocity and speed is needed to be calculated for the whole journey
( I cant see your whole picture clearly...so I will assume that the 2 cities are "A" & "B" )

A-------------------------------------B

lets say the distance from A to B is "a"

now definition of distance is ..when a vehicle moves from A to B , then again from B to A..the total lenth its covered

which means when it goes from A to B..it will be "a"..and then it return..again it will be "a"..hence finally the total distance will be ( a+ a) = "2a"


now if we co sider the displacement when a vehicle moves from A to B and return to A.. the definition of displacement says the dispalcement is the shortest distance between the initial and the final position of a body

now the initial position is A..and the final position is also A..in the end..the total displacement is 0 ( a - a)

now for finding speed.. speed = total disatance / total time

velocity = total displacement / total time


hipe this helps :)