50429

Экспериментальное определение среднего значения периода Тсвоб свободных колебаний; Ткрут крутильных колебаний (в зависимости от выбранной модели)

Лабораторная работа

Физика

Экспериментальное определение среднего значения периода Тсвоб свободных колебаний; Ткрут крутильных колебаний в зависимости от выбранной модели. Экспериментальное определение зависимости периода Ткач колебаний с качением наклонного маятника от значения угла наклона плоскости колебаний. Сравнение экспериментально установленной зависимости периода Ткач колебаний с качением от значения угла наклона плоскости колебаний с теоретическими моделями различной степени сложности. Измерение периода свободных колебаний: № измерения...

Русский

2014-02-03

128.5 KB

1 чел.

Цель работы:

        1. Экспериментальное определение среднего значения периода Тсвоб   свободных колебаний; Ткрут   крутильных колебаний (в зависимости от выбранной модели).

        2. Экспериментальное определение зависимости периода Ткач() колебаний с качением наклонного маятника от значения угла наклона  плоскости колебаний.

        3. Сравнение экспериментально установленной зависимости периода Ткач() колебаний с качением от значения угла наклона  плоскости колебаний с теоретическими моделями различной степени сложности.

4. Определение значения коэффициента трения µк качения.

Ход работы:

1.    Измерение периода свободных колебаний:

№ измерения

Время колебаний(с)

Число колебаний

1

13,893

10

2

13,907

10

3

13,898

10

Среднее значение

13,8993

tcp=(c)

Тсвоб=,    где N – число колебаний

Тсвоб=(с)

2. Измерение периода крутильных колебаний.

№ измерения

Время колебаний(с)

Число колебаний

1

23,224

10

2

23,211

10

3

23,218

10

Среднее значение

23,2176

tcp=(c)

Ткрут   где N – число колебаний

Ткрут=(с)

3. Измерение периода колебаний качения.

градус

Т1

Т2

Т3

φ1

φ2

φ3

<Т>

<φ>, рад

1,5291

1,5286

1,5309

4,9

4,7

4,5

1,5295

0,082

10º

1,5316

1,5313

1,5302

4,9

4,8

4,6

1,5310

0,083

13º

1,5364

1,5329

1,5315

4,8

4,9

4,5

1,5336

0,082

16º

1,5375

1,5366

1,5383

4,7

4,5

4,8

1,5375

0,081

19º

1,5401

1,5399

1,5449

4,6

4,9

4,7

1,5416

0,082

22º

1,5519

1,5509

1,5510

4,8

4,5

4,9

1,5513

0,082

Найдём средний период по формуле:

Tcp=

а) при 7º

    Tcp=

б) при 10º

    Tcp=

в) при 13º

    Tcp=

г) при 16º

    Tcp=

д) при 19º

    Tcp=

е) при 22º

    Tcp=

Найдём φ среднее и переведём его в радианы по формуле .

а) при 7º

    

б) при 10º

    

в) при 13º

    

г) при 16º

    

д) при 19º

    

е) при 22º

    

Найдём линейную амплитуду для каждого значения угла  по формуле:

A0i=i, где L-длина нити, L= 45 см:

A01 = 0,082 · 45 = 3,69 м

A02 = 0,083 · 45 = 3,73 м

A03 = 0,082 · 45 = 3,69 м

A04 = 0,081 · 45 = 3,64 м

A05 = 0,082 · 45 = 3,69 м

A06 = 0,082 · 45 = 3,69 м

4. Определение коэффициента трения качения.

С помощью программы вычислим значение

Радиус шарика равен Rш = 1,5 (см) = 0,015 (м)

Т.к. левые части уравнений одинаковы, можем прировнять

=

= 0,0015 (м)

После ввода данных в программу получили:

Модель1:

y = 1,51·x

x

y

yтеор = 2,72·x

x

y

Модель2:

y = 0,25·x + 0,35

x

y

yтеор = 0,5x + 0,07

x

y

Вывод:

        1. Экспериментально определили среднего значения периода  свободных колебаний;   крутильных колебаний.

        2. Экспериментально определили зависимость периода колебаний качениея наклонного маятника от значения угла наклона  плоскости колебаний и определили амплитуду для каждого значения угла .

4. Определение значения коэффициента трения µк качения.

    Министерство Образования Республики Беларусь

               УО Брестский Государственный Технический Университет

           Кафедра Физики

          Лабораторная работа М8

            по Физике

                                          Тема:

Выполнил:

студент группы 1 ИИ-1

Лахмицкий А.А.

Проверил:

Янусик И.С.

Брест 2004г.


 

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