Laboratory work 1 measuring the acceleration of body movement. Physics lesson plan (grade 10) on the topic: Laboratory work "Measuring the acceleration of a body during uniformly accelerated motion"

LESSON PLAN (2 hours)

Lesson topic: « Laboratory work No. 1 “Measurement of body acceleration at uniformly accelerated motion».

Type of activity – practical

Lesson objectives:

Purpose of the work: calculate the acceleration with which a ball rolls down an inclined chute. To do this, measure the length of movement s of the ball per known time t. Since in uniformly accelerated motion without initial speed

1. Organization of the lesson

1) mark those absent in the class register;

2) mbilization educational activities students:friendly attitude of the teacher and students, quickly integrating the class into a business rhythm, organizing the attention of all students

2. Work progress

then by measuring s and t, you can find the acceleration of the ball. It is equal to:

No measurements are made absolutely accurately. They are always produced with some error due to imperfection of measuring instruments and other reasons. But even if there are errors, there are several ways to carry out reliable measurements. The simplest of them is calculating the arithmetic mean from the results of several independent measurements of the same quantity, if the experimental conditions do not change. This is what we propose to do in this work.

Measuring tools: 1) measuring tape; 2) metronome.

Materials: 1) gutter; 2) ball; 3) tripod with couplings and foot; 4) metal cylinder.

Work order

1. Strengthen the gutter using a tripod in an inclined position at a slight angle to the horizontal (Fig. 175). At the bottom end of the gutter, place a metal cylinder in it.

2. Having released the ball (simultaneously with the metronome strike) from the upper end of the groove, count the number of metronome strikes before the ball collides with the cylinder. It is convenient to carry out the experiment at 120 beats of the metronome per minute.

3. By changing the angle of inclination of the chute to the horizon and making small movements of the metal cylinder, ensure that between the moment the ball is launched and the moment it collides with the cylinder there are 4 metronome beats (3 intervals between beats).

4. Calculate the time the ball moves.

5. Using a measuring tape, determine the length of movement s of the ball. Without changing the inclination of the trough (the experimental conditions must remain unchanged), repeat the experiment five times, again achieving coincidence fourth strike metronome with the ball hitting a metal cylinder (the cylinder can be moved a little for this).

6. According to the formula

find the average value of the displacement modulus, and then calculate the average value of the acceleration modulus:

7. Enter the results of measurements and calculations into the table:

Experience number

s, m

sav, m

Number

blows

metro

noma

t, s

asr, m/s2

In rectilinear uniformly accelerated motion without initial speed

where S is the path traveled by the body, t is the time it takes to travel the path. Measuring instruments: measuring tape (ruler), metronome (stopwatch).

The laboratory setup and procedure for performing the work are described in detail in the textbook.

№ experience

t, s

S, m

0,5

0,028

5,5

0,5

0,033

0,49

0,039

5,5

0,49

0,032

6,5

0,51

0,024

average value

5,7

0,5

0,031

Calculations:

Calculation of errors

Accuracy of instruments: Measuring tape:

Laboratory work No. 1

1. PURPOSE OF THE WORK

2. THEORY

Movement in which the speed of a body changes over equal periods of time is called uniformly accelerated. The main characteristic of uniformly accelerated motion is acceleration:, which shows how fast the speed changes. The acceleration of some bodies can be determined experimentally, for example, the acceleration of a moving ball along a chute. For this, the equation of uniformly accelerated motion is used:. If , then . When measuring values, some errors are allowed, so you need to carry out several experiments and calculations and find the average value.

3. EQUIPMENT

gutter;
ball;
tripod with couplings and foot;
metal cylinder;
ruler;
stopwatch.

4. PROCEDURE FOR PERFORMANCE OF THE WORK

4.1 Assemble the installation.

4.2 Launch the ball from the upper end of the chute, determine the time of movement of the ball before colliding with the cylinder located at the other end of the chute.

4.3 Measure travel length ball.

4.4 Substituting values And , determine the acceleration, substituting into the equation.

4.5 Without changing the angle of inclination of the chute, repeat the experiment 4 more times, determine the value for each experiment.

4.6 Determine the average acceleration value:.

4.7 Record the results of measurements and calculations in a table.

4.8 Complete the work, draw a conclusion, answer Control questions, To solve the task.

5. TABLE OF RESULTS

Experience no.	Path length Sn, m	Movement time tn, s	Acceleration	Average acceleration value	Errors

6. CALCULATIONS

IN this section it is necessary to write down the calculations for each experiment and write down the value

7. CONCLUSION

8. CHECK QUESTIONS

8.1 What is it instantaneous speed? average speed? How are they determined?

8.2 Write the equation of uniformly accelerated motion and free fall tel.

8.3 Solve the problem:

Preview:

Laboratory work No. 1

Measuring the acceleration of a body during uniformly accelerated motion.

1. PURPOSE OF THE WORK

Study of uniformly accelerated motion of a body on an inclined plane.
Determination of the acceleration of a ball moving along an inclined chute.

2. EQUIPMENT

gutter;
ball;
tripod with couplings and foot;
metal cylinder;
ruler;
stopwatch.

3. PROCEDURE FOR PERFORMANCE OF THE WORK

3.1 Assemble the installation.

3.2 Launch the ball from the upper end of the chute, determine the time of movement of the ball before colliding with the cylinder located at the other end of the chute.

3.3 Measure travel length ball.

3.4 Substituting values And , determine the acceleration, substituting into the equation.

3.5 Without changing the angle of inclination of the chute, repeat the experiment 4 more times, determine the value for each experiment.

Movement time tn, s

Acceleration

Average acceleration value

5. CALCULATIONS

In this section you need to write down the calculations for each experiment.

6. CONCLUSION

7. CHECK QUESTIONS

7.1 What is instantaneous speed? Average speed? How are they determined?

7.2 Write the equation of uniformly accelerated motion and free fall of bodies.

7.3 Solve the problem:

A body is thrown vertically upwards initial speed 30 m/s. In how many seconds will it be at a height of 25 meters? (Explain the meaning of the answer).

group No. _________________________

Completed by:_______________________

Physics lesson plan in 9th grade

Subject: Laboratory work No. 1“Measurement of the acceleration of a body during uniformly accelerated motion.”

Physics teacher at KSU " high school No. 13": Ganovicheva M. A.

Educational learn to measure acceleration under uniform acceleration straight motion; experimentally establish the relationship of paths, traversed by the body with uniformly accelerated rectilinear motion over successive equal intervals of the body.

Developmental: promote the development of speech, thinking, cognitive and general educational skills: planning actions, preparing workplace, document the results of the work; promote mastery of scientific research methods: analysis and synthesis.

Educational: to form a conscientious attitude towards academic work, positive motivation for learning, communication skills; contribute to the education of humanity and discipline.

Lesson type: Reinforcement lesson theoretical knowledge.

Form: Research.

Lesson plan:
I. Organizational stage.
2. Stage of updating basic knowledge.
3.Stage independent work students.
4. Reflection.
5.Final stage.

Material support for each group: report form; instructions cut into phrases;

laboratory trough metal long 1.4 m, metal ball with a diameter of 1.5-2 cm, metronome, ruler.

During the classes:

Organizational moment.

Greetings. Establishment work discipline. Marking absentees. Communicate objectives and lesson plan. Dividing a class into groups using the method random selection.

Because Today you are working in groups, everyone must try to do their part of the work as well as possible. Let's check the d/z. Each group member answers the questions after paragraph 5 to his comrades.

Let's talk about TB. To prevent accidents, instruments on the demonstration table should be placed in such a way that during experiments there is no possibility of flying parts getting into students.

Before you begin the work, understand the progress of the work by listening to the teacher.

To create a dialogue, I offer students instructions for completing laboratory work, cut into phrases. Appendix 2. This required students not just to reproduce previously acquired knowledge, but to reveal the logic scientific research.

Students were asked to discuss practical task, outline ways to solve it, implement them in practice and, finally, present the result found jointly.

Which involved developing the ability to clearly express one’s thoughts (build complete and clear statements) and understand a partner (listen to him, grasp not only the immediate meaning of his phrases, but also their meaning).

Glue the instructions together, fill in the blank lines and columns.

DURING OPERATION

1. Be attentive, disciplined, careful.

2. Do not leave your workplace without the teacher's permission.

3. Place instruments, materials, and equipment at the workplace in order; there should be no foreign objects on the table. Handle the metal ball carefully! Do not overtighten the tripod couplings!

If you find any malfunctions in the condition of the devices you use, please notify your teacher.

Students perform laboratory work, draw conclusions from it, and fill out a report form. Annex 1. If students master the logic of scientific research, then they will glue the instructions together in the order presented below.

PROGRESS:

Assemble the installation according to the drawing

Release the ball from the top end of the chute

Measure the distance h - the height of the upper end of the gutter and the distance S traveled by the ball.

Calculate the time t of the ball's movement based on the number of metronome beats.

Calculate the acceleration of the ball

Change the slope of the gutter and repeat the experiment two more times.

Enter the results of measurements and calculations into the table.

Distance,	Number of metronome beats	Driving time	Acceleration,

Calculate the average acceleration.

Write down the conclusion: what you measured and what the result was.

The teacher conducts a consultation individual work and receives the report and answers to control questions from the group that completed the task first in time. These students then act as the teacher and take reports from the following groups.

4. Reflection.

Well, our lesson is coming to an end. In the atmosphere and environment in which we worked today, each of you felt differently. And now I would like you to evaluate how internally comfortable you felt in this lesson, each of you, all together as a class, and whether you liked the work that we did today.

5.Final stage.

Now let's evaluate your work together in today's lesson. Groups and grades are named. Each of you was in a group during the lesson and the grade received today is given the same to each group member. We will assign groups for the next lesson. You will perform an experiment performed many times by Galileo to determine the acceleration of falling objects. Groups receive an advanced task: find information about Galileo, assign roles and plan the group’s work.

Annex 1

Lab Report #1

Measuring the acceleration of a body during uniformly accelerated motion

Groups 9 “__” ________________________________________________________________________________________________________________

Purpose of the work: to measure the acceleration of a ball rolling down an inclined chute.

ABOUT
Equipment: metronome, ________________________________________________________________________________________________________________

Appendix 2

PROGRESS:

We assembled the installation according to the drawing

Released the ball from the upper end of the chute

We measured the distance S traveled by the ball.

We calculated the time t of the ball's movement based on the number of metronome beats.

Calculated the acceleration of the ball

We increased the angle of the chute and repeated the experiment again.

The results of measurements and calculations were entered into a table.

Distance,	Height of the upper end of the gutter, m	Number of metronome beats	Driving time	Acceleration,

The average acceleration was calculated.

Laboratory work No. 2 in physics, grade 9 (answers) - Determination of acceleration during uniformly accelerated motion of a body

5. Find and tabulate the averages And .

6. Calculate and enter into the table the average value of the acceleration of the ball using the formula.

7. Calculate and enter into the table the value of the absolute error Δl.

8. Calculate maximum value absolute random error in measuring the time interval t.

9. Determine the absolute systematic error of the time period t.

10. Calculate the absolute error value direct measurement time period t.

11. Calculate the values relative error measurements of length and time interval.

	l	t	a	Δl	Δt	ε	ε
1	65	1,43	-	0,1	0,48	0,15	29,81
2	65	1,8	-	-	-	-	-
3	65	1,38	-	-	-	-	-
4	65	1,71	-	-	-	-	-
5	65	1,72	-	-	-	-	-
Wed.	65	1,61	50,19	-	-	-	-

Answer security questions

1. What is the modulus of displacement for a given movement of the ball? what is the direction of the displacement vector?

Represents a vector that connects two points in a motion path, the start and end points. Vector in in this case this is a gutter.

2. Will the average speeds of the ball be equal when it moves in the first and second halves of the path? Why?

The average speeds will be different, because during movement the ball is subject to the forces of gravity and friction, which can slow it down.

Conclusions: I learned to calculate the acceleration of a rolling ball and the errors in measuring the time of movement of the ball along the chute.

Physics lesson plan in 9th grade

Subject: Laboratory work No. 1 “Measurement of the acceleration of a body during uniformly accelerated motion.”

Physics teacher of KSU “Secondary School No. 13”: Ganovicheva M. A.

Educational: learn to measure acceleration during uniformly accelerated linear motion; to experimentally establish the ratio of the paths traversed by a body during uniformly accelerated rectilinear motion over successive equal intervals of the body.

Developmental: promote the development of speech, thinking, cognitive and general educational skills: plan actions, prepare a workplace, document the results of work; promote mastery of scientific research methods: analysis and synthesis.

Educational: to form a conscientious attitude towards academic work, positive motivation for learning, communication skills; contribute to the education of humanity and discipline.

Lesson type: Lesson to consolidate theoretical knowledge.

Form of conduct: Research work.

Lesson plan:

I. Organizational stage.

2. Stage of updating basic knowledge.

3. Stage of independent work of students.

4. Reflection.

5.Final stage.

Material support for each group:report form; instructions cut into phrases;

laboratory metal trough 1.4 m long, metal ball with a diameter of 1.5-2 cm, metronome, ruler.

During the classes:

Organizational moment.

Greetings. Establishing work discipline. Marking absentees. Communicate objectives and lesson plan. Dividing the class into groups using random selection.

Let's talk about TB. To prevent accidents, instruments on the demonstration table should be placed in such a way that during experiments there is no possibility of flying parts getting into students.

Before you begin the work, understand the progress of the work by listening to the teacher.

Students were asked to discuss a practical task, outline ways to solve it, implement them in practice, and, finally, present the result they found together.

Glue the instructions together, fill in the blank lines and columns.

DURING OPERATION

1. Be attentive, disciplined, careful.

2. Do not leave your workplace without the teacher's permission.

3. Place instruments, materials, and equipment at the workplace in order; there should be no foreign objects on the table. Handle the metal ball carefully! Do not overtighten the tripod couplings!

If you find any malfunctions in the condition of the devices you use, please notify your teacher.

PROGRESS:

Assemble the installation according to the drawing

Release the ball from the top end of the chute

Measure the distance h - the height of the upper end of the gutter and the distance S traveled by the ball.

Calculate the time t of the ball's movement based on the number of metronome beats.

Calculate the acceleration of the ball

Change the slope of the gutter and repeat the experiment two more times.

Enter the results of measurements and calculations into the table.

№ experience

Distance,

S, m

Number of metronome beats

Driving time

t = 0.5 n,

Acceleration,

a = 2 S / t2,

m/s 2

Calculate the average acceleration.

Write down the conclusion: what you measured and what the result was.

The teacher conducts individual consulting work and accepts the report and answers to test questions from the first group to complete the task. These students then act as the teacher and take reports from the next groups.

4. Reflection.

5.Final stage.

Annex 1

Lab Report #1

Measuring the acceleration of a body during uniformly accelerated motion

Groups 9 “__” ________________________________________________________________________________________________________________

Purpose of the work: to measure the acceleration of a ball rolling down an inclined chute.

Equipment: metronome, ________________________________________________________________________________________________________________

Appendix 2

PROGRESS:

We assembled the installation according to the drawing

Released the ball from the upper end of the chute

We measured the distance S traveled by the ball.

We calculated the time t of the ball's movement based on the number of metronome beats.

Calculated the acceleration of the ball

We increased the angle of the chute and repeated the experiment again.

The results of measurements and calculations were entered into a table.

№ experience

Distance,

S, m

Height of the upper end of the gutter, m

Number of metronome beats

Driving time

t = 0.5 n,

Acceleration,

a = 2 S / t2,

m/s 2

The average acceleration was calculated.

Conclusion: