Everything Science Grade 10

CHAPTER 20. VECTORS AND SCALARS 20.3

5. Mpihlonhle walks to the shop by walking 500 m Northwest and then 400

m N 30◦E. Determine her resultant displacement by doing appropriate

calculations.

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(1.) 008v (2.) 008w (3.) 008x (4.) 008y (5.) 008z

Chapter 20 | Summary

See the summary presentation ( Presentation: VPgig at http://www.everythingscience.co.za)

• A scalar is a physical quantity with magnitude only.


• A vector is a physical quantity with magnitude and direction.


• Vectors may be represented as arrows where the length of the arrow indicates the
  magnitude and the arrowhead indicates the direction of the vector.


• The direction of a vector can be indicated by referring to another vector or a fixed
  point (e.g. 30 ◦from the river bank); using a compass (e.g. N 30 ◦W); or bearing (e.g.
  053 ◦).


• The resultant vector is the single vector whose effect is the same as the individual
  vectors acting together.

Chapter 20 End of chapter exercises

1. A point is acted on by two forces in equilibrium. The forces

a. have equal magnitudes and directions.

b. have equal magnitudes but opposite directions.

c. act perpendicular to each other.

d. act in the same direction.

Physics: Mechanics 385