PHYSICS CHAPTER 1, SECTION 4

Graphing Motion: Distance, Velocity, and Acceleration

Do Now

With a partner grab 1 Speed Machines worksheet from the front table. Work the problems together

August 27, 2012HW: PTG #1-11, pg 68/69 skip 10 Due Friday

Do Now (NB pg 15 ): 1.3 Quiz WDYS WDYT

TB Pg 52

Success Criteria Define acceleration using words

and equation Calculate speed, distance, and

time, using the equation for acceleration

Interpret distance-time and velocity-time graphs for different types of motion

Agenda: Do Now Physics Talk Notes Practice Problems Acceleration Relay Quiz 1.4

Of the 4 different distance vs time graphs, indicate which fit the below descriptions

1____ No motion 2____ constant speed 3____ faster motion at the beginning 4____ faster motion at the end

A B C D

Do Now

A bus travels between the 275 m marker and the 400 m marker on a highway in 20 s. The average speed of the bus during this interval is….

A soccer player kicks a ball at 32 m/s. If the goal is 10 m from the player approximately how much time does it take for the ball to reach the goal?

Physics Talk (Notes)

What is acceleration?

What is velocity?

Change in velocity with respect to time

Speed in a direction

Physics Talk (notes)

How can velocity change?

Increase or decrease in speed

Change in direction (turn)

So if velocity is changing…so is acceleration!

Physics Talk (notes)

What is positive acceleration?

What is negative acceleration?

Final velocity is more than initial velocity

Final velocity is LESS than initial velocity

Physics Talk (notes)

Describing acceleration using strobe photos

What is happening to the velocity and acceleration in this strobe photo?

Physics Talk (notes)

What is the equation for acceleration?

Acceleration = Δvelocity

Δtime

a=Δv Δt

Δt

Δv

a

Physics Talk (notes)

Practice Problem At the start of a race, a toy car increases speed from 0m/s to 5.0m/s as the clock runs from 0s to 2.0s. What is the acceleration?

Physics Talk (notes)

Describing acceleration using Graphs

Physics Talk (notes)

Comparing motion Graphs

Physics Talk (notes)

Practice Problems

HW:PTG #1-11, skip 10 Do Now (NB pg 15 ):

Get out signed grade report Finish Formula Challenge (10

min)

Success Criteria Define acceleration using

words and equation Calculate speed, distance,

and time, using the equation for acceleration

Interpret distance-time and velocity-time graphs for different types of motion

Agenda: Do Now Physics Talk Notes Practice Problems Acceleration Relay Quiz 1.4

Speed/Acceleration Relay as individuals!

1.4 Quiz