PHYS 101 Lecture Notes - Lecture 1: Unit Vector
12 Jan 2017
School
Department
Course
Professor
PHYS 101 LECTURE NOTES WEEK 1
Spencer Kociba
Drexel University
Lecture 1 (01/10/17)
Dr. Brigita Urbanc
bu25@drexel.edu
Notes about the class in general:
● Lecture attendance counts (taken using Learning Catalytics: a Pearson add-
on that should come with MasteringPhysics. It’s a polling system where
before the lecture the professor will email/give the session code for the day)
● All information for the course will be in BBLearn (but the labs have a separate
website they may use)
● Course ID for MasteringPhysics: urbanc 67863 (section C)
● Prelectures are due Tuesday by 9am (no matter what section you are)
Chapter 1: Units, Physical Quantities and Vectors
● Basic Physical Quantities
○ Length, time, mass (meters, seconds and kilograms are most commonly
used)
○
○
○ 1in= 2.54cm
○ Use conversion factors (which are equal to 1) to change units
● Scalar quantities
○ Single numbers (has a unit)
○ Note: speed is a scalar quantity because it is the magnitude of a vector but
not the direction.
● Vector quantities
○ Values that describe something with both magnitude and direction (positive
values)
● Vectors
○
○ Equal if they have the same magnitude and direction
■ Includes vectors of equal magnitude and exactly opposite directions
○ Addition is commutative
■ Note: Vectors can ONLY be added if they are of the same units
○ Subtraction is the sum of the opposite sign of a vector
■ A-B=A+(-B)
Lecture 2 (01/12/17)
● Unit vector: any vector with a magnitude of 1 (no units)
○ i points in the +x direction
○ j points in the +y direction
○ k points in the +z direction
Tail Head
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Lecture attendance counts (taken using learning catalytics: a pearson add- on that should come with masteringphysics. It"s a polling system where before the lecture the professor will email/give the session code for the day) All information for the course will be in bblearn (but the labs have a separate website they may use) Course id for masteringphysics: urbanc 67863 (section c) Prelectures are due tuesday by 9am (no matter what section you are) Length, time, mass (meters, seconds and kilograms are most commonly used) Use conversion factors (which are equal to 1) to change units. Note: speed is a scalar quantity because it is the magnitude of a vector but not the direction. Values that describe something with both magnitude and direction (positive values) Equal if they have the same magnitude and direction. Includes vectors of equal magnitude and exactly opposite directions. Note: vectors can only be added if they are of the same units.
