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IB Physics--Topic#1 Uncertainty-Qc#10-Paper 2- A horizontal rod hanging at the end of a string
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A student investigates the oscillation of a horizontal rod hanging at the end of a vertical string. The diagram shows the view from above.
The student starts the rod oscillating and measures the largest displacement for each cycle of the oscillation on the scale and the time at which it occurs. The student begins to take measurements a few seconds after releasing the rod.
The graph shows the variation of displacement x with time t since the release of the rod. The uncertainty for t is negligible.
. On the graph above, draw the line of best fit for the data.
Calculate the percentage uncertainty for the displacement when t=40s.
. The student hypothesizes that the relationship between x and t is
where a is a constant. To test the hypothesis x is plotted against as shown in the graph.
(i) The data point corresponding to t=15s has not been plotted. Plot this point on the graph above.
(ii) Suggest the range of values of t for which the hypothesis may be assumed to be correct.
Topic#Playlist1 Uncertainty and error
The student starts the rod oscillating and measures the largest displacement for each cycle of the oscillation on the scale and the time at which it occurs. The student begins to take measurements a few seconds after releasing the rod.
The graph shows the variation of displacement x with time t since the release of the rod. The uncertainty for t is negligible.
. On the graph above, draw the line of best fit for the data.
Calculate the percentage uncertainty for the displacement when t=40s.
. The student hypothesizes that the relationship between x and t is
where a is a constant. To test the hypothesis x is plotted against as shown in the graph.
(i) The data point corresponding to t=15s has not been plotted. Plot this point on the graph above.
(ii) Suggest the range of values of t for which the hypothesis may be assumed to be correct.
Topic#Playlist1 Uncertainty and error
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