This

**preview**shows half of the first page. to view the full**3 pages of the document.**PHY1331 – Chapter 2 Textbook Notes

Position

- location in relation to a reference point (origin)

- we can determine motion from position

Different Methods of Displaying Information

- pictorial representation

- graphical representation (ex. position-time graph)

- tabular representation

- mathematical representation

Displacement Δx = change in position over a period of time, can be positive or

negative value

Δx = (xf – xi) This is the equation and represents the Δx as being the difference

between the final position (xf) and initial position (xi)

Distance = different from displacement and is known as being the length of path,

can only be a positive value

Vector Quantity = direction and a magnitude

Scalar Quantity = numerical value with no direction

Average Velocity

- dimensional analysis is L/T

- SI units are m/s

- Can be either a positive or negative value due to the nature of Δx

- Equation is vavg = Δx/Δt where Δx is the displacement and the Δt is the time

interval and can only be positive

Average Speed

- SI units are m/s

- Can only be a positive value and has no direction

- Equation is vavg = d/Δt where the total distance d is divided by the time

interval

Example 2.1. Find displacement & average velocity

Given Values

XA = 30m

XF = -53m

TA = 0s

TF = 50s

Displacement Equation

ΔX = XF - XA

ΔX= -53m – 30m = -83m

find more resources at oneclass.com

find more resources at oneclass.com

###### You're Reading a Preview

Unlock to view full version