The relationship between mass (m) and the square of the period (T2) for a single spring is given by the formula for the period of a mass-spring system, T = 2pi sqrt((m)/(k1)), where $k1

Mathematics

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(xvii) Determine the slope, s1s_1, of the graph.

  1. The relationship between mass (mm) and the square of the period (T2T^2) for a single spring is given by the formula for the period of a mass-spring system, T=2πmk1T = 2\pi \sqrt{\frac{m}{k_1}}, where k1k_1 is the spring constant of the single spring.

    Squaring both sides gives:

    T2=4π2mk1T^2 = 4\pi^2 \frac{m}{k_1}
  2. Rearranging the equation to match the graph axes (mm on the vertical axis and T2T^2 on the horizontal axis), we get

    m=(k14π2)T2m = \left(\frac{k_1}{4\pi^2}\right) T^2
  3. Comparing this to the equation of a straight line y=s1xy = s_1 x, where y=my=m and x=T2x=T^2, the slope s1s_1 is

    s1=k14π2s_1 = \frac{k_1}{4\pi^2}

    Since no experimental data is provided, the numerical value of s1s_1 cannot be determined. It represents the ratio of the spring constant to 4π24\pi^2.

    (xviii) On the same axes, plot mm on the vertical axis and T02T_0^2 on the horizontal axis.

    This step was explained in the previous response (Step xvi). You would plot the data points for the parallel spring system (mm vs. T02T_0^2) on the same graph as the single spring system, using different symbols or colors to distinguish them. A best-fit straight line passing through the origin would then be drawn for these points.

    (xix) Determine the slope, s2s_2, of the graph.

  4. For two identical springs in parallel, the effective spring constant keffk_{eff} is the sum of the individual spring constants.

    If each spring has a constant k1k_1, then keff=k1+k1=2k1k_{eff} = k_1 + k_1 = 2k_1.

  5. The period of oscillation T0T_0 for the parallel spring system is T0=2πmkeff=2πm2k1T_0 = 2\pi \sqrt{\frac{m}{k_{eff}}} = 2\pi \sqrt{\frac{m}{2k_1}}.

    Squaring both sides gives:

    T02=4π2m2k1T_0^2 = 4\pi^2 \frac{m}{2k_1}
  6. Rearranging the equation to match the graph axes (mm on the vertical axis and T02T_0^2 on the horizontal axis), we get

    m=(2k14π2)T02m = \left(\frac{2k_1}{4\pi^2}\right) T_0^2
  7. Comparing this to the equation of a straight line y=s2xy = s_2 x, where y=my=m and x=T02x=T_0^2, the slope s2s_2 is

    s2=2k14π2s_2 = \frac{2k_1}{4\pi^2}

    Since no experimental data is provided, the numerical value of s2s_2 cannot be determined. It represents the ratio of twice the spring constant to 4π24\pi^2.

    (xx) Evaluate γ=s2s1\gamma = \frac{s_2}{s_1}.

  8. Substitute the expressions for s1s_1 and s2s_2

    γ=s2s1=2k14π2k14π2\gamma = \frac{s_2}{s_1} = \frac{\frac{2k_1}{4\pi^2}}{\frac{k_1}{4\pi^2}}
  9. Simplify the expression

    γ=2k14π2×4π2k1=2\gamma = \frac{2k_1}{4\pi^2} \times \frac{4\pi^2}{k_1} = 2

    The value of γ\gamma is 2\boxed{\text{2}}.

    (xxi) State two precautions taken to ensure accurate results when performing this experiment.

    • Ensure oscillations are purely vertical and not swinging sideways to avoid energy loss and inaccurate period measurements.
    • Avoid parallax error when reading the stopwatch or measuring the extension of the spring.

    How does change in the number of springs affects the frequency of the system?

    The frequency (ff) of a mass-spring system is inversely proportional to the period (TT), and directly proportional to the square root of the spring constant (kk). When the number of springs in parallel increases, the effective spring constant (keffk_{eff}) of the system increases. Since f=12πkeffmf = \frac{1}{2\pi} \sqrt{\frac{k_{eff}}{m}}, an increase in keffk_{eff} leads to an increase in the frequency of the system.

    A spring has a stiffness of 125 Nm−1125 \, \text{Nm}^{-1}. If a weight of 8.0 N8.0 \, \text{N} is suspended on it, calculate the extension, ee of the spring.

  10. Apply Hooke's Law, which states that the force (FF) applied to a spring is directly proportional to its extension (ee), where kk is the spring constant (stiffness)

    F=keF = ke
  11. Substitute the given values

    F=8.0 NF = 8.0 \, \text{N} and k=125 Nm−1k = 125 \, \text{Nm}^{-1}.

    8.0 N=(125 Nm−1)×e8.0 \, \text{N} = (125 \, \text{Nm}^{-1}) \times e
  12. Solve for ee

    e=8.0 N125 Nm−1e = \frac{8.0 \, \text{N}}{125 \, \text{Nm}^{-1}} e=0.064 me = 0.064 \, \text{m}

    The extension of the spring is 0.064 m\boxed{\text{0.064 m}}.

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