1 / 15

# PHY 430 – Lecture 2 - PowerPoint PPT Presentation

PHY 430 – Lecture 2. Scalars & Vectors. 3.1 Scalars & vectors. Scalars – quantities with only magnitudes Eg. Mass, time, temperature Mathematics - ordinary algebra Vectors – quantities with magnitudes & directions Eg. Displacement, velocity, acceleration Mathematics - vector algebra.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' PHY 430 – Lecture 2' - jasmine-kaufman

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### PHY 430 – Lecture 2

Scalars & Vectors

• Scalars – quantities with only magnitudes

• Eg. Mass, time, temperature

• Mathematics - ordinary algebra

• Vectors – quantities with magnitudes & directions

• Eg. Displacement, velocity, acceleration

• Mathematics - vector algebra

• 1. Give its componens, Vx and Vy

• 2. Give its magnitud V and angle  it makes with positive x – axis

• We can shift from one description to the other by using theorem of Pythagoras and definition of tangent

• For 3-D Cartesian coordinate system

• i = unit vector in the direction of x

• j = unit vector in the direction of y

• k = unit vector in the direction of z

• Fig. 3-15

Products of vectors

• Dot product: A B =IAIIBIcos

A  B = B  A

• Cross Product: A X B =IAIIBIsin  n

A x B = - B x A