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PASCO ME-9430, Инструкция по эксплуатации и руководство по экспериментам, Страница: 28 / 30

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012-04840E

Dynamics Cart

24

®

Replacement Parts

Description

Part No.

Qty

Wheel-axle assembly

ME-6957

4

End cap, modified

648-04699

2

For rear end cap assembly add:

End cap plug

648-04694

1

Plunger bar

648-04653

1

Plunger bar knob assembly

Screw (10-32x1/4 socket cap)

610-179

1

Knob

620-033

1

Plunger bar catch cover

699-04658

1

Compression spring (plunger bar)

632-035

1

Suspension spring

632-034

4

Base plate

648-04651

1

Velcro tab, 1/2 inch, Loop

616-074

1

Velcro tab, 1/2 inch, Hook

616-075

1

500 g Mass

648-04636

1

Содержание ME-9430

Страница 1: ...Instruction Manual and Experiment Guide for the PASCO scientific Model ME 9430 012 04840E Dynamics Cart with Mass...

Страница 2: ......

Страница 3: ...s Cart with Mass Manual is copyrighted and all rights reserved However permission is granted to non profit educational institutions for reproduction of any part of this manual providing the reproducti...

Страница 4: ...age vs Instantaneous Velocities 3 Experiment 2 Coefficient of Friction 5 Experiment 3 Newton s Second Law Predicting Accelerations 7 Experiment 4 Cart Calibration Measuring the Spring Constant 11 Expe...

Страница 5: ...clude rounded corners on molded plastic end caps for durability a tray on top of the cart for application of additional mass and the ability of the carts to be stacked While performing experiments you...

Страница 6: ...9448 or Super Pulley ME 9450 used with Model ME 9376A Universal Table Clamp and Model SA 9242 Pulley Mount ing Rod Metric Ruler such as PASCO s Metric Measuring Tape SE 8712 and 30cm 12in Ruler SE 87...

Страница 7: ...given by vav EQN 1 If the acceleration of the cart is constant as it rolls to a stop over the floor then the initial instantaneous velocity of the cart at the final moment of launch is given by v0 2v...

Страница 8: ...slightly upward to allow one of the notches on the plunger bar to catch on the edge of the small metal bar at the top of the hole NOTE If the timer feels that a distraction interfered with the measur...

Страница 9: ...e value of two unknowns you must have two equations Theory The cart will be launched several times in one direction and then it will be launched several times along the same course but in the opposite...

Страница 10: ...2 1 3 Using EQN 3 compute the accelerations corresponding to your data and an average accel eration for each of the two directions 4 Using the results of step 3 determine r and by solving for the two...

Страница 11: ...An experimental value for the cart s acceleration a can be determined from Assuming that the tabletop is truly horizontal i e level Newton s Second Law F ma predicts that the acceleration of this sys...

Страница 12: ...nd record this distance at the top of Table 3 1 NOTE The total mass of the system will remain constant throughout the experiment 7 Practice releasing the cart being careful not to give it any push or...

Страница 13: ...m MTOTAL __________ grams Trial 1 5 4 3 2 6 Diff Average time sec m grams aexp cm s2 aTh cm s2 8 7 Table 3 1 10 50 40 30 20 60 80 70 Questions 1 Can you think of any systematic errors that would effec...

Страница 14: ...012 04840E Dynamics Cart 10 Notes...

Страница 15: ...ing plunger As compressional forces F are applied to the spring the spring will compress a distance x which is measured with respect to its uncompressed equilibrium position If F vs x is plotted on gr...

Страница 16: ...ow your slope calcula tions on the graph and record k below 6 Determine the mass of the cart using a mass balance and record this value below 7 Using EQN 3 and your values for m xo i e the compression...

Страница 17: ...012 04840E Dynamics Cart 13 Table 4 1 Trial 1 5 4 3 2 6 m kg 8 7 x meters F mg newtons...

Страница 18: ...012 04840E Dynamics Cart 14 Notes...

Страница 19: ...ill call this zero impulse sweet spot SS2 For a given bat and pivot the position of SS2 can be found from where I is the rotational inertia of the bat for the corresponding pivot m is the total mass o...

Страница 20: ...have chosen and release it allowing it to strike the cart plunger Record the corresponding values of y and x in Table 5 1 4 Repeat step 3 four times for each value of y changing it from roughly 10 to...

Страница 21: ...h both SS1 and SS2 coincide If so what changes would have to occur to the uniform rod to bring SS1 and SS2 closer together You might use the Sweet Spot computer program to help you answer this 2 What...

Страница 22: ...er of mass is the pivot located m S INPUT How large is the load mass kg m IF m 0 GOTO Skip INPUT How far is the load mass from the pivot m y Skip I 1 12 Ms L 2 Ms S 2 m y 2 PE Ms S m y 1 COS theta g W...

Страница 23: ...eased is the angle of the ramp to the horizontal and k is the coefficient of kinetic or sliding friction In this experiment you will use the principle of the conservation of energy to predict D given...

Страница 24: ...n and enter it below data Table 6 1 4 Use EQN 2 to calculate the coefficient of kinetic or sliding friction Enter it below the data table Prediction of D and Measurement of D 5 Now reduce the angle of...

Страница 25: ...eleration _________ coefficient of sliding friction _________ _________ Predicted value of D _________ cm Questions 1 In analyzing this system has the energy been fully accounted for Discuss 2 How do...

Страница 26: ...012 04840E Dynamics Cart 22 Notes...

Страница 27: ...reinstall A 1 Phillips point screw driver is required Replacing the Front End Cap Attachments Screw the plunger bar knob finger tight onto the plunger bar Peel off Velcro tab and replace with new tab...

Страница 28: ...add End cap plug 648 04694 1 Plunger bar 648 04653 1 Plunger bar knob assembly Screw 10 32x1 4 socket cap 610 179 1 Knob 620 033 1 Plunger bar catch cover 699 04658 1 Compression spring plunger bar 6...

Страница 29: ...ay you won t lose valuable data If possible have the apparatus within reach when calling This makes descriptions of individual parts much easier If your problem relates to the instruction manual note...

Страница 30: ......

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