Everything Science Grade 11

11.5 CHAPTER 11. VECTORS

Exercise 11 - 1

1. Classify the followingquantities as scalars or vectors:

(a) 12 km

(b) 1 m south

(c) 2 m·s−^1 , 45◦

(d) 075◦, 2 cm

(e) 100 km·hr−^1 , 0◦

2. Use two different notations to write down the direction of the vector in each of the following
   diagrams:

(a)

(b)^60

◦

(c)

40 ◦

More practice video solutions or help at http://www.everythingscience.co.za

(1.) 00mz (2.) 00n0

11.5 Drawing Vectors ESBEE

In order to draw a vector accurately we must specify a scale and include a reference direction in the

diagram. A scale allowsus to translate the lengthof the arrow into the vector’s magnitude. For instance

if one chose a scale of1 cm = 2 N (1 cm represents 2 N), a force of20 N towards the East would

be represented as an arrow 10 cm long. A reference direction may be aline representing a horizontal

surface or the points ofa compass.

20 N

N

S

W E