Chapter 3b Lecture (Vectors)

# Chapter 3b Lecture (Vectors) - General Physics I General...

This preview shows pages 1–12. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: General Physics I General Physics I Vectors Vectors Geometry Geometry b a B A A B = a b A a = B b Trigonometry Trigonometry a b h A B H a A = b B a A = h H b B = h H Trigonometry Trigonometry θ opposite adjacent hypotenuse opposite sin = θ hypotenuse adjacent cos = θ hypotenuse opposite tan = θ adjacent Vectors Vectors V θ x y V y V x x V cos = θ V y V sin = θ V y V = V× sin θ x V = V× cos θ Vectors Vectors • A force of 20 Newtons acts on an object at an angle of 25° above the x-axis. Find the x and y-components of the force. 20 N 25° x y F y F x x F = 20cos25° x F = 18.1 N y F = 20sin25° y F = 8.45 N Vectors Vectors 20 N 25° x y F y F x r F= (18.1, 8.45) N ˆ ˆ r F= 18.1x + 8.45y r F= 18.1 i+ 8.45 j Notation Adding Vectors Adding Vectors • Add the vectors A=(3,5) N and B = (2,7) N r r A+ B= (3, 5)+ (2, 7) r r A+ B= (3+ 2, 5+ 7) r r A+ B= (5, 12) N Adding Vectors Adding Vectors x y r 1 1 1 1 1 F = (F cos , F sin ) θ θ r 2 2 2 2 2 F = (F cos , F sin ) θ θ r 1 F r 2 F r r 1 2 1 1 2 2 1 1 2 2 F + F = (F cos + F cos , F sin + F sin ) θ θ θ θ Question Question...
View Full Document

## This note was uploaded on 09/04/2008 for the course PHYS 201 taught by Professor Durig during the Spring '08 term at VCU.

### Page1 / 32

Chapter 3b Lecture (Vectors) - General Physics I General...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online