Download - SPEED & VELOCITY
![Page 1: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/1.jpg)
3
SIMULATIONS :
http://hypertextbook.com/physics/mechanics/displacement/
(distance & displacement)
http://regentsprep.org/Regents/physics/phys01/velocity/default.htm
(distance & displacement – ant)
![Page 2: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/2.jpg)
4
A car is moving towards North
A snake is crawling
Speed limit on the highway in Malaysiais 110 kmh-1
An athlete is moving towards the checkpoint at a velocity of 25 ms-1
![Page 3: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/3.jpg)
5
DIFFERENCES BETWEEN DISTANCE & DISPLACEMENT
B
A
![Page 4: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/4.jpg)
6
B
distance
displacement
A
![Page 5: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/5.jpg)
7
DISTANCE AND DISPLACEMENT
Total length travelled from point A to point B
Total distance travelled in a specified direction
A
B
![Page 6: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/6.jpg)
8
DISTANCE The total path length travelled from
one location to another Scalar quantity SI unit : m
![Page 7: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/7.jpg)
9
DISPLACEMENT The distance between two location
measured along the shortest path
connecting them in a specified
direction Vector quantity SI unit : m
![Page 8: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/8.jpg)
10
SPEED & vELoCITy
![Page 9: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/9.jpg)
11
SPEED The rate of change of distance
Average speed = total distance travelled, s
time, t
Scalar quantity SI unit : ms-1
![Page 10: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/10.jpg)
12
The rate of change of displacement
Average velocity = total displacement , s
time, t
Vector quantity SI unit : ms-1
vELoCITy
![Page 11: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/11.jpg)
13
ISTANTANEoUS SPEED :
The speed at any instant
ISTANTANEoUS vELoCITy :
The velocity at any instant
![Page 12: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/12.jpg)
14
http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/kinema/trip.html
(average speed)
![Page 13: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/13.jpg)
15
APPLICATIoN :
![Page 14: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/14.jpg)
16
QUESTIoN 1 :
A cow moves 3 m to the East and the
4 m to the North. Find the :
(a) Total distance moved by the cow
(b) Displacement of the cow
![Page 15: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/15.jpg)
17
North East
West East
North
South
South East
North West
South West
DIRECTION
![Page 16: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/16.jpg)
18
ANSWER 1 :
A B
C
3 m
4 m
(a)The total distance moved by the cow
= 3 m + 4 m
= 7 m
(b) Displacement of the cow
= √32 + 42
= 5 m due to North East
![Page 17: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/17.jpg)
19
QUESTION 2 :
O A
BFigure shows the path travelled by a
cyclist. He started his journey from O, moved a distance of 150 m to East towards A and then moved a distance of 200 m to North towards B. The cyclist took about 25 s to complete his journey. Determine :
(a) The total distance travelled
(b) The displacement from O
(c) The average speed of the cyclist
(d) The average velocity of the cyclist
150 m
200 m
![Page 18: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/18.jpg)
20
O A
B
150 m
200 m
ANSWERS 2 :
![Page 19: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/19.jpg)
21
(a) Total distance travelled
= 150 m + 200 m
= 350 m
(b) Displacement
= √1502 + 2002
= 250 m due North East
![Page 20: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/20.jpg)
22
(c) Average speed
= 350 m
25 s
= 14 ms-1
(d) Average velocity
= 250 m
25 s
= 10 ms-1
![Page 21: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/21.jpg)
23
REFLECTION / CLOSURE (EVALUATION)
![Page 22: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/22.jpg)
24
DIFFERENCES BETWEEN DISTANCE & DISPLACEMENT :
DISTANCE DISPLACEMENT
The total path length travelled from one location to another
The distance between two location measured along the shortest path connecting them in a specified direction
Scalar quantity Vector quantity
SI unit : metre SI unit : metre
![Page 23: SPEED & VELOCITY](https://reader035.vdocuments.us/reader035/viewer/2022062320/559774fd1a28ab8d698b45cb/html5/thumbnails/23.jpg)
25
DIFFERENCES BETWEEN SpEED & vEloCITy :
SPEED VELOCITY
The rate of change of distance
The rate of change of displacement
Scalar quantity Vector quantity
Average speed = total distance travelled, s time, t
Average velocity = total displacement , s time, t
SI unit : ms-1 SI unit :ms-1