Question

A graph of position versus time for a certain particle moving along the x axis is shown in the figure below. Find the average velocity in the following time intervals. (The horizontal axis is marked in increments of 5 s and the vertical axis is marked in increments of 5 m.)

Answer 1

a)

$‹v_1›=\frac{25-0}{10-0}=2.5~\frac ms,$

b)

$‹v_2›=\frac{25-12.5}{20-0}=0.63~\frac ms,$

c)

$‹v_3›=\frac{12.5-25}{20-10}=-1.25~\frac ms,$

d)

$‹v_4›=\frac{-12.5-12.5}{35-20}=-1.67~\frac ms,$

e)

$‹v_5›=\frac{0-0}{40-0}=0~\frac ms.$