PHYS1001 Lecture Notes - Lecture 2: Negative Number

41 views3 pages

13 Jun 2018

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Lecture 2- scalars, vectors, physical quantities

Scalars

• Something that has magnitude 

• Any quantitative 

• E.g. distance, speed, time, weather forecast (temperature) 

Vectors

• Something that has magnitude and direction- two qualities that define a vector 

• E.g. displacement, velocity, acceleration, fluid flow rate, light propagation 

• Does not point at something points on a direction 

• Magnitude represented by length of arrow 

• Magnitude (vector length) can be calculated using Pythagoras 

• Angles can be found using Pythagoras 

• A vector multiplied by a number (a scalar), it’s magnitude multiplied by that

number 

◦ If you multiply by a negative number you change its direction as well 

◦ 3D vectors 

find more resources at oneclass.com

Unlock document

This preview shows page 1 of the document.
Unlock all 3 pages and 3 million more documents.

Already have an account? Log in

Get access