Introduction to Physics, Measurements and Vectors Part 2

Q Write the scientific notation of the following numbers
a) 134,013 and b) 0.000314?
L Explains some common use and operations of a scientific calculator (5 min)
L Reacts to the students task.
L Explains how a vector is plotted in the coordinate system graphically. (Sec 1-8) For another example, use the following force vectors as the example
F1 =10 N, 300 North of East.
F2 =22 N, 1100
T Looks up to Figure 1-4 in the text,
L Explains the components of a vector (sec1.9)
S Looks up to the Figure 1-11 in the text
Q What are the x, y and z components of the following vector in Example 1-7?
L Reacts to the answer.
Summary:

The two characteristics of a vector are:
• A vector can be transferred to any point or place without changing its magnitude and direction
A vector has (x, y & z) components
L Explains how to add and subtract vectors using the Example 1-7, together with the student.
L Reacts to the process of solving the sample problem:
T Solve the exercise ( 1.28) in the textbook in groups of two.
L Moves around
L Reacts to the Answer of Exercise Nos. ( 1.28)
S Finish solving the other exercise (Ex 1.31) at home.
L Writes the answer at the corner of the board for feedback.
Ass. Read (Sec 1-10) on Unit Vectors

Q What is the magnitude of a unit vector? What is its purpose? A unit vector is a vector with magnitude of 1 unit. Its purpose Is to point a direction in space.

What letter is used to represent a unit vector on the x-axis? on the y-axis? on the z-axis?

L Discusses the example 1-9 (Vector Difference)

T Determine the resultant and the vector difference of F1 from F2 below , utilizing ( I - j. – k ) notation.

F1 =10 N, 300 North of East.
F2 =22 N, 1100
L Reacts to their answers
L Look together with the students the Figure 1-17 on ( p.19) for the Dot Product representation and explains how to multiply vectors by Dot Product, mathematically.
S Study the example 1-11 on p.21, and solve the exercise no. 1-42 on p27.
L Reacts to their answers.
L Look together with the students the Figure 1-21 on ( p.22) for the Cross Product representation and explains how to multiply vectors by Cross Product.
S Study the example 1-12 on p.23, and solve the exercise no. 1-46 on p27.
L Reacts to their answers
Assignments or Quiz: Exercise Nos. 1-43 &1-44
CHAPTER EXAMINATION follows.
Previous half