Краткосрочный план на тему "Закон сохранения импульса"

Conservation of momentum

Chapter:	9.2 Conservation laws
Full name of the teacher	Kassymova Rysty
Date:	31.01.23
Grade: 9	Number of people:	Absent: -
Topic:	Conservation law of momentum
Lesson objects according to the curriculum	9.2.3.2 - to formulate the law of conservation of momentum and apply it in problem solving;
Learning outcomes:	-          Can apply the formula of conservation of momentum -          Distinguish the formula of conservation of momentum

Lesson plan

Lesson stage/ time	Actions of teacher	Students Actions	Assessment	Resources
Start of the lesson: (5-7 min) 3 min	Introduction of studens «Brain storm» Check the home task What is the momentum? How mometum is represented? Unit of mesuring of momentum?	Students answers the question		Presentation slide № 1
The main part: 4 min 2 min 4 min 2 min       1 min 20 min 6 min	Video for startig the new lesson «What is conservation of momentum». Introduce objectives of the lesson Task from worksheet № 1. Fill the table. Online simulation. Explaining types of collision. “Elastic and Inealastic collision” Divide into groups. «Mind map». Make a poster. Poster criteria: ¾    Formula ¾    Defenition of collision ¾    Example of problem soolving Worksheet №2. Solving the problems.	Watching the video Discuss the objectives of the lesson Fill the table Worksheet № 1 . Determine the formula and defenition of the momentum conservation law. Distinguish the elstic and inelastic collisions. Dividing into two groups. Work with textbook Making the poster Explain the poster Solve the problems Worksheet №2	Checkin by yourself with correct answers Discuss the types of collisions Assessment according to the poster criteria Chacking by classmate with correct answers.	http://tiny.cc/8bi3vz slide №2 slide №3 slide №4 http://tiny.cc/rjn3vz slide №5 Textbook, poster slide №6 Worksheet, slide №7
End of the leson: (3 min)	Hometask: ex. 75-81 Reflection Padlet	Uses Qr code for feedback		Qr code

Worksheet #1

1.     Watch the video, and fill the table. Raise your hand when will see information you need.

 

Worksheet #2

2.     Solve the problems

1 variant

1.      A 2 kg ball moving with a velocity of 20 m/s on a frictionless horizontal surface undergoes a head-on inelastic collision with another object, as shown in the figure. If they move off together after the collision, what is the common velocity of the balls?                                 [2]

2.      Two identical balls moving at velocities of 4 m/s and -2 m/s, as shown in the figure, undergo a head-on elastic collision. Calculate the final velocities of these balls after the collision.

                                                                                                                                               [4]

Worksheet #1

1.     Watch the video, and fill the table. Raise your hand when will see information you need.

 

Worksheet #2

2.     Solve the problems

1.      Two 2 kg balls moving with velocities of 4 m/s and 2 m/s on a smooth horizontal surface undergo a head - on inelastic collision, as shown in the figure. What is the common velocity of the balls after the collision?                                                                                               [2]

2.      Two balls of masses m₁=2 kg, m₂=3kg move towards each other. They have velocities of v1=5 m/s and v2=10 m/s, as shown in the figure. If they undergo a head on perfectly elastic collision, find the velocities of the objects after the collision.                                              [4]