Page 121 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

Alas... is
your score
zero today? No, amma.
Today my teacher taught
me displacement. See, this is
the displacement that
occurd to me when I went to
school and came back.

Fig. 9.3

While stating the displacement, it is necessary to indicate
the direction along with the magnitude of the distance
travelled. Such physical quantities having both magnitude
and direction are referred to as vector quantities. Physical
quantities of which the direction is not to be indicated, are
scalar quantities.

Displacement is a vector quantity. Is distance then a vector or
a scalar quantity?
On the basis of the information you have
B gathered, observe Figure 9.4 and complete
60 m
C Table 9.3. A person starts his journey from
A and goes to D through B and C and comes
60 m back to A.
80 m 30 m

100 m
A D
Fig. 9.4

Change of While While While While
position of the reaching B reaching C reaching D returning to A
traveller
Distance

Displacement

Table 9.3
120 Basic Science VIII