... of oscillations counted should be about 20 as it is easier to count a larger number. The reaction time needed to count one single oscillation would be so small that errors could easily occur. The timing for 20 oscillations should be repeated to calculate an average time. The string is now adjusted and measured for a longer length, about an extra 10cm. The experiment is repeated 6 more times, with the length of string being increased by 0.1m. The force of gravity is constant, whereas the length and the time period are variable. Therefore the equation for the time period - T = 2(((L/g) can be re arranged and compared to the equation of a graph - y = m x + c. Where: T = Time period L = Length g = gravity y and x are always the variables, and m and c are the constants. Since gravity is the constant, a value for the ...

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