Comment décrire le mouvement d'un objet ?
Object in motion, how can you describe it ?
50 minutes)
Discuss
15
1
Pupils give some words to describe motion, teacher collecte the words on tricider or on the blackboard :
http://www.tricider.com/brainstorming/2sSDJW3svnR
Read
15
3
Sum up :
To describe the motion of an object we need his :
trajectory and speed
skier / skieur : http://bit.ly/2emvmj2
100 m JO Rio 2016 :
https://www.youtube.com/watch?v=V9sxs9ekWC0
Big wheel /Grande roue
https://edpuzzle.com/media/580dcd727d3fee093f91ee5a
Collaborate
15
0
Give a short définition of the trajectory and the speed
Discuss
5
1
Discuss the definitions with the pupils and write a commun definition of trajectory and speed.
Exercices to calculate speed at home.
Notes: The videos are projected to the class so as to have a discussion and a commun definition that we write together on the computer project to the class.
Trajectory / trajectoire :
the way the object moves /
chemin suivi par un objet au court du temps.
Average Speed / Vitesse moyenne :
distance divided by time /
distance parcourue divisée par la durée du parcours
Resources attached: 0
What is the average speed of a walker
65 minutes)
Discuss
10
0
How can we have the speed of a walker ?
What can we measure ?
Investigate
15
0
Write 2 or 3 sentences to explain the mesures you have to lead to obtain the average speed of a walking pupil.
Commun procedure and drawing.
Practice
25
0
Each team (3 or 4 pupils) take 1 chronometer and 1 meter outside.
Each team draw a straight line of 4 m on the floor and mesure the time to cross this 4 meter by walk of each pupils.
Sum up the datas on the computer.
Calculate the average speed of each pupil, of each team and of all the class.
Discuss
10
0
Discuss with the pupils about the date measurments :
How they walked (regular irrégular on the line, ...).
Measurment mistakes (chrnometer, meter, ...).
Investigate
5
3
The average speed of a walker is 5 km/h compare wtih the Data collected by the class.
Notes: The datas are collected on the teachers computer and projected to all the class, with diagrams.
Resources attached: 0
Motions types / Types de mouvements
45 minutes)
Read
10
2
Accelerated motion / mouvement accéléré
Decelerated motion / mouvement ralenti
Uniform motion / mouvement uniforme
Read
10
1
Pupils has to watch the video and answer to the questions.
Collaborate
25
0
Each team has to pick up a word and work on it to create a poster that can illustate an d define the word piked up.
To help them they have the video, online dictionnaries science books.
Notes: The videos are projected to the class.
Resources attached: 0
Relative Motion
53 minutes)
Read
3
1
The teacher project the video (0: 00 till 1:37) with the projector :
link : https://www.youtube.com/watch?v=Fftar0rLi7Q
Pupils watch the video a first time and read the questions
Discuss
10
0
Discussion about the video
Is there only one point of view ?
What object is chosen ?
Investigate
20
1
The teacher projects the video (0:00 till 1:37) with the projector 2 times :
The second time pupils watch the video and answer to the questions on their note book
The third time pupils draw the trajectory of the balloon in the 2 differents point of view : the ground and the car
And they correct their answers.
Collaborate
15
0
Pupils compare their answer and discuss about it
Each group project the video from (1:23 till 1:37) with the projector :
2 pupils in front of the screen with a pointer :
Each pupil represent a point of view and with the pointer they point each position of the balloon on the screen so as to draw its trajectory.
Each group of pupil do the same and correct their answers
Discuss
5
0
Each group present their answer
The teacher projects the video (1:37 till 2:07) with the projector so as to corect pupils answers