Mechanics: Vector and scalar quantity.

Introduction

Good Day learners I Mr B Mthombeni, today we will be looking at a very interesting topic called Mechanics specifically focusing on vectors and scalar quantities. .

questions frequently asked: 

  • What are the differences between scalars and vectors?
  • What is meant, by position, distance, distance, displacement, speed, velocity and acceleration, and how are these quantities related?
  • how do we use graphical methods to represent vectors, displacement, velocity and acceleration?
  • follow the link to broaden your understanding of vectors.

https://youtu.be/rcDXQ-5H8mk

 

Task
  • Read the following questions carefully
  • all solutions must be clearly stated
  • the assessment is out of 18 marks.

Question 1

  1. Complete the table below, consider each quantity and decide if each quantity is a vector or scalar. Fill in the magnitude and the direction (if any) of each quantity.

Quantity

Vector or scalar?

Magnitude

Direction

  1. 60 km/h (60 kilometres per hour)

 

 

 

  1. 23 degrees Celsius

 

 

 

  1. 3 steps to the right

 

 

 

  1. 3,5 h

 

 

 

  1. 100g

 

 

 

  1. 34km North

 

 

 

  1. 120 km/h South

 

 

 

  1. 45cm

 

 

 

  1. 220V (220 volts)

 

 

 

  1. 1.5A (1.5 amperes)

 

 

 

  1. Your weight is 600 N

 

 

 

 

Question 2

  1. Define
  1. Scalar   vector
  2. Describe how fully we represent a vector graphically.
  3. What is the bearing of a vector?
  4. Describe how we work with vectors using: head to tail method
  5. State how many vectors you can add using a head to tail method.

Explain the meaning of a resultant of two or more vectors

Total mark = 19

Process

To understand vectors and what they represent or mean follow these guidelines.

  • read/study the meaning of the difference between vectors and scalar.
  • Read on how to represent vectors on a diagram 
  • describe the difference between a vector and a scalar.
  • read or study the properties if vectors: for example, equality of vectors,  negative vectors, multiplication of vectors by scalar, vector addition and subtraction.
  • follow the link above for guidance.
  • Physical Science text book can be used (Study and master)

 

Evaluation

This assessment will be evaluated using a rubric below, the rubric is structured to accommodate every detail of the questions given on task.

Criteria

Excellent

5

Good

4

Satisfactory 3

Poor

1-2

Absent

0

Mark

 

Defining vector and scalar quantity

Describe how fully we represent a vector graphically

Explaining a bearing vector

Describe vectors using a head to tail method.

 

 

 

 

 

 

State how many vectors can be added?

Explain the meaning of a resultant of vectors.

 

 

 

 

 

 

Defining the scalar and vector quantity examples, indicate their magnitude and direction.

 

 

 

 

 

 

TOTAL

    /19

Conclusion

congratulations on reaching this final stage of the assessment and lesson. as by now you should be able to:

  • differentiate between scalars and vectors
  • negative vectors 
  • drawing the head to tail method of the diagram 
  • defining the resultant force
  • calculating the resultant force

you can follow these links to recap on the work to better understand the concept.

 

Credits

sources cited for compiling this lesson are:

  • Youtube
  • Study and master Text book
  • the internet 

so for the next class we will focus on motion in one direction linking it to the current topic for they work hand in hand.

Teacher Page

For more information or needing clarity contact:

bmthombeni872@gmail.com

or call 0724212292

or call 011 485 3330