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A 1.00 m long wooden rod has a series of small holes drilled at 10 mm intervals along its length - Scottish Highers Physics - Question 15 - 2019
Question 15
A 1.00 m long wooden rod has a series of small holes drilled at 10 mm intervals along its length. The rod is hung on a horizontal pin passing through a hole 50 mm fr... show full transcript
Worked Solution & Example Answer:A 1.00 m long wooden rod has a series of small holes drilled at 10 mm intervals along its length - Scottish Highers Physics - Question 15 - 2019
Step 1
Describe a method to obtain an accurate value for the period T using only a stopwatch.
Answer
To obtain an accurate value for the period T, follow these steps:
- Measure the Total Time: Use the stopwatch to time multiple swings of the pendulum. Count at least 10 complete oscillations and record the total time taken for these oscillations.
- Calculate the Period: Divide the total time recorded by the number of oscillations counted. This will provide a more accurate average period T for one complete oscillation.
Step 2
Using the square-ruled paper on page 41, draw a graph of T against h.
Answer
On the square-ruled paper, plot the values of h (in meters) on the x-axis and the corresponding values of T (in seconds) on the y-axis. Ensure that appropriate labels and units are used. You may represent the data with a curve of best fit or smooth line that accurately reflects the trend of the data.
Step 3
Step 4
Step 5
Suggest an improvement to the experimental procedure that would allow a more precise value for the minimum period T to be determined.
Answer
To improve the experimental procedure, consider using smaller increments when adjusting the position of the rod. This will allow for more accurate measurements of h and provide more data points for determining T. Additionally, make multiple measurements at each position to determine an average period.
Step 6
Use data from the table on page 40 to calculate a value for C when h is 0.30 m.
Answer
Using the relationship , plug in the values for T and h from the data table. For h = 0.30 m, calculate T^2 and rearrange the equation to find C. Assuming g is approximately 9.81 m/s², you can substitute the values and solve for C.