Page 120 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

N

W E Govt. Hospital
S Village Office
600 m 300 m
480 m

420 m Ration depot.
660 m

Fig. 9.2
But he came back through the road along the ration depot. Let’s
analyse the distance he travelled. The length of the road taken for
travelling is the distance.

Distance is the length of the path travelled.
What is the distance travelled by him to reach the office? And
to reach home?.
Are the distances travelled in both the situations equal?

Find the straight line distance from his home to his office and
write it down.

Will he reach the office if he travels 480 m towards north?
In which direction should he travel 480 m to reach the office?

This 480 m straight line distance from home to office eastwards is
his displacement.
What is the total distance covered by him if he travelled from home
to office and back home?
What is his displacement?

Displacement is the straight line distance from the initial position to
the final position. It has both magnitude and direction. Its unit is
metre (m).
A stone thrown vertically upwards travels to a height 6 m and falls
back to the hand. On the basis of the above statement complete the
table.

Distance travelled Displacement
Situation
by the stone of the stone
When the stone reaches the topmost position

When the stone falls back in the hand

Table 9.2
Basic Science VIII 119