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Motion of the trolley on the inclined plane

Extracts from this document...


Gracja Kowalska kl.II ib                2008-10-22



Aim:  The lab demonstrates what kind of motion is observed when the metal trolley is let freely down the inclined plane.


If the metal trolley is let free down the inclined plane, its move will be accelerated. Later, as the air resistance and friction force have influence on acceleration, they will change it.


        The first part of experiment included preparing an inclined plane. The physics book by Giancoli was laying down on one table, while the other school table was laid on the book. This action is presented on  the Drawing 1.  The length of the school table is 120±1 cm measured by a ruler. The width of the table is not required. The difference in levels between a table and the highest point of the inclined plane is 6.8±1 cm .

        Using a ruler with exactness to millimeters and a chalk, we calculated and determined six distances of the same value 15 cm with the uncertainty of 1 cm.

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1.50 s

1.77 s

2.05 s


0.65 s

0.98 s

1.26 s

1.55 s

1.80 s

2.04 s


0.57 s

0.93 s

1.27 s

1.50 s

1.71 s

2.05 s


0.63 s

0.99 s

1.26 s

1.56 s

1.77 s

2.00 s


0.59 s

0.98 s

1.28 s

1.58 s

1.79 s

2.03 s


0.65 s

0.96 s

1.27 s

1.51 s

1.80 s

1.98 s


0.62 s

0.95 s

1.30 s

1.52 s

1.73 s

2.03 s


0.62 s

0.96 s

1.26 s

1.53 s

1.78 s

2.02 s

Rounded to 2 decimal place

TABLE 2: Measurements of  distance, time and its change.

d [cm] ±1.00 cm

t [s] ±0.

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        As all experiments, this one also involve errors and can be improved.  The uncertainty could be reduced, the millimeter paper could be used instead of the ruler, hard cover instead of Giancoli. Considering air resistance and friction force could help with estimating particulars.  The usage of more precise timer could also improve our measurements and further analysis. More readings could give better results and therefore improve the whole experiment. The fact that the inclined plane had a low angle could also change the expected results; if the inclined plane were higher, the results would be more precise.

Not including and using in calculations the values of air resistance and friction force has influenced the calculation, and what follows, the results of the experiment. If the values of air resistance, fraction force and other variables were considered and therefore calculated, it would show, that our experiment was done correctly.

...read more.

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