motion, velocity, and acceleration - book m, chap. 1.1
DESCRIPTION
PowerPoint presentation for our first textbook section that includes information and formulas for speed, velocity, and acceleration.TRANSCRIPT
Warm-UpAug. 24,2011
Identify at least 3 moving objects that you can observe from your seat.
Reference Points Tour
Object in Motion Reference Point
Warm-UpAug. 25,2011
How could we connect this to moving objects and reference points?
Measuring MotionChapter 1, Section 1
Determining Speed
Who’s Faster?
Who’s Faster?
100 meters 10 seconds
100 meters 15 seconds
Who’s Faster?
100 meters 10 seconds
100 meters 15 seconds
Who’s Faster?
100 meters 10 seconds
150 meters 10 seconds
Who’s Faster?
100 meters 10 seconds
150 meters 10 seconds
Who’s Faster?
180 meters 10 seconds
160 meters 8 seconds
Who’s Faster?
180 meters 10 seconds
160 meters 8 seconds
Speed = distance/time
= 180m 10 s
= 160m 8 s
Who’s Faster?
180 meters 10 seconds
160 meters 8 seconds
Speed = distance/time
= 180m 10 s
= 160m 8 s
18 m/s
20 m/s
Speed or Velocity?Speed –
the rate at which an object moveshow fast an object moves15 m/s (meters per second)
Velocity – an object’s speed in a specific direction
how fast AND which way an object moves
5 m/s north
Speed or Velocity?20 m/s -
17 m/s east -
100 m/s up –
0.15 m/s -
Speed
Speed
Velocity
Velocity
Formula Triangle
Speed = distance/time
S
D
TX
Warm-UpAug. 26,2011
Fill in the triangle with the formula for speed.
What is the velocity of a car that traveled 252 miles East in 4
hours?
Speed = Distance/Time
What is the velocity of a car that traveled 252 miles E in 4
hours?
S
D
T
Distance 252 mi. = Time 4 hr.
63 mph E
Acceleration
• Acceleration – The rate at which velocity changesA change in velocity
(Speed or Direction)
Examples:Speeding up- A plane taking offSlowing down- A car stopping at a red lightChanging direction – A car turning at a corner
Determining Acceleration
Acceleration = final velocity – initial velocity
time
A
Vf - Vi
T
Warm-UpAug. 29,2011
What two factors determine an object’s speed?
Practice Problem:What is the velocity of a runner traveling 35 meters North in 7
seconds?
Distance and Time
Speed = Distance Time
= 35 m 7 s
= 5 m/s
Graphing Velocity
Constant Velocity vs. Acceleration