Chapter 11 MOTION. VIDEO 34 seconds Drag Race.
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Transcript of Chapter 11 MOTION. VIDEO 34 seconds Drag Race.
![Page 1: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/1.jpg)
Chapter 11MOTION
![Page 2: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/2.jpg)
VIDEO
http://www.youtube.com/watch?v=uDP7Pty8Qnw
@ 34 secondsDrag Race
![Page 3: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/3.jpg)
11.1DISTANCE AND DISPLACEMENT
![Page 4: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/4.jpg)
System of objects that are not moving with respect to each other
Frame of Reference needed to describe motion accurately and completely
Ex: Moving car and a tree on the side of the road
Relative Motion: movement in relation to frame of reference
FRAME OF REFERENCE
![Page 5: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/5.jpg)
Distance: Length of path between 2 pointsDisplacement: direction and distance in a straight line
from the starting point
DISTANCE AND DISPLACEMENT
![Page 6: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/6.jpg)
Vector: quantity that has magnitude and directionAdd displacements using vector additionWhen 2 vectors have same direction add themWhen 2 vectors have opposite directions subtract
them
COMBINING DISPLACEMENTS
![Page 7: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/7.jpg)
Resultant Vector: sum of two or more vectors
COMBINE DISPLACEMENTS
![Page 8: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/8.jpg)
1. What is a frame of reference, how is it used to measure motion?
2. How are distance and displacement different?
3. How are displacements combined?
SECTION REVIEW QUESTIONS
![Page 9: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/9.jpg)
Horse Head Nebula (interstellar clouds of dust), found in Orion, dark portions are thick dust, pinkish glow is from hydrogen gas
![Page 10: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/10.jpg)
11.2SPEED AND VELOCITY
![Page 11: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/11.jpg)
The ratio of the distance and object moves to the amount of time an object moves
How far an object goes in a certain amount of time
S = D/T or V = D/TAvg. Speed = calculated for the entire tripInstantaneous speed = calculated at a point
in time
SPEED
![Page 12: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/12.jpg)
MATH TRIANGLE
S
D
T
S =D/TD = S x TT = D/S
![Page 13: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/13.jpg)
Nissan GTR 11.2 Sec @ 121.8 miles/hour How long was the race?
D=S * T 121.8 miles/hour = .03 miles/secondD = .03 miles/second * 11.2 seconds = .38
miles
MATH PRACTICE
![Page 14: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/14.jpg)
Description of both speed and directionVelocity is a vectorWhy is velocity a vector?
Has both magnitude (size) and direction.Changes in velocity can be: in speed, direction or in both
VELOCITY
![Page 15: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/15.jpg)
Decide in the scenarios below if there is a change in velocity:
A car is going 45 mph and stops at a stop light.
A driver going down a straight portion of the highway is using cruise control to remain at a constant speed.
A child is riding a merry go round.
VELOCITY PRACTICE
![Page 16: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/16.jpg)
MATH TRIANGLE
V
D
T
V =D/TD = V x TT = D/V
![Page 17: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/17.jpg)
Two or more velocities may be added by vector addition
A boat is heading down river at 20 mph, the river is flowing at 3 miles per hour, what is the combined velocity?
23 mph
COMBING VELOCITIES
![Page 18: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/18.jpg)
Distance time graphs show velocity
DISTANCE-TIME GRAPHS
![Page 19: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/19.jpg)
0-60 in 3 seconds (acceleration)Reaching speeds in upper 60’s (velocity)
![Page 20: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/20.jpg)
11.3ACCELERATION
![Page 21: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/21.jpg)
ACCELERATION
Acceleration is a vectorChanges in speed direction or both (change in
object’s velocity)Can be positive change in speed, increasing speedCan be negative change in speed, decreasing speedExample: Airplane taking off is positive acceleration,
airplane landing is negative acceleration
F-16
![Page 22: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/22.jpg)
Changes can be in direction Merry go round is constant acceleration (constant speed
always changing direction)Changes can be in both direction and speed
Ex: Roller Coaster
ACCELERATION
![Page 23: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/23.jpg)
Free Fall: movement of an object toward Earth due to gravity
Unit is: m/s2
Objects on accelerate towards Earth at a rate of 9.8 m/s2
Constant Acceleration: steady (constant) change in velocity
Instantaneous Acceleration: How fast a velocity is changing at a specific instant
ACCELERATION
http://www.youtube.com/watch?v=AvKJ9DcaJ8M&noredirect=1
![Page 24: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/24.jpg)
CALCULATING ACCELERATION
Vf - Vi
A t
![Page 25: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/25.jpg)
Slope of a speed-time graph is acceleration
GRAPHING ACCELERATION
![Page 26: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/26.jpg)
Acceleration is a curved line on a distance-time graph
GRAPHING ACCELERATION
![Page 27: Chapter 11 MOTION. VIDEO 34 seconds Drag Race.](https://reader036.fdocuments.us/reader036/viewer/2022062401/5a4d1aef7f8b9ab05997d311/html5/thumbnails/27.jpg)
http://www.youtube.com/watch?v=q4Z7M4bPfHk
Red Bull Jump