Tasks for the work carrying out

1. Check energy and momentum conservation laws fulfillment for all possible variants of interactions.

2. Calculate balls motion characteristics after an impact in accordance with the task variants (table 1).

Table 1

Number of place
, kg	0,2	0,4	0,6	0,8	1,0	1,2	1,4	1,6
, kg	1,6	1,4	1,2	1,0	0,8	0,6	0,4	0,2
, m	0,7	0,9	1,8	1,5	1,2	1,4	1,6	1,8
, m	0,6	0,6	1,2	1,0	0,6	0,7	0,4	0,9
, m/s

4. Work procedure

Choose the model «Соударения упругих шаров» in the section «Механика».

1. Conservation laws fulfillment examination.

Carry out experiments at m₁ > m₂ for different variants of initial conditions given in table. 2.

The first method:

1.1. Put the cursor arrow on the key «Сброс» and click the left button of mouse.

1.2. Set necessary initial conditions. For this purpose put a cursor on the control line of necessary parameter and set a necessary value by pressing the left button of mouse.

The second method: Put a cursor on the symbol “increase [>]” or “decrease [<]” of a parameter and click the left key until necessary values will be set.

1.3. Start an experiment (start). For this purpose put a cursor on the symbol «Start» and click the left mouse button.

1.4. Write out the results of the experiment from window 2 and enter them into table. 2.

Do items 1.1—14 once more at m₁ < m₂ for all variants of initial conditions from table 2.

Table 2

Before impact

After impact

d < 1

v 1

v 2

v 3

d = 1

v 1

v 2

v 3

d > 1

v 1

v 2

v 3

2. Balls motion characteristics calculation

2.1. Determine in accordance with the task variants.

2.2. Choose and to set on the panel m₁ and m₂ so that

.

2.3. Set initial velocity equaled . If is outside a scale, you have to set an arbitrary value.

2.4. Set the aimed parameter d = 0.

2.5. Start an experiment. Enter the obtained results into table 3.

Table 3

d		0,2	0,4	0,6	0,8	1,0	1,2	1,4	1,6	1,8	1,98
a1
v 1
a2
v 2

2.6. Changing the value of aimed parameter d, carry out an experiment for all its values given in table 3.

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