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Labs U1 3 - Bent Wire

This experiment investigates how the period of oscillation of a bent metal wire varies with the angle between its straight arms. The method involves bending a wire to different angles between 30-150 degrees and measuring its period of oscillation. A graph of 1/T^4 versus the cosine of the angle will be plotted and related to the equation of a straight line graph to calculate the acceleration due to gravity.

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Justin Mahabir
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397 views1 page

Labs U1 3 - Bent Wire

This experiment investigates how the period of oscillation of a bent metal wire varies with the angle between its straight arms. The method involves bending a wire to different angles between 30-150 degrees and measuring its period of oscillation. A graph of 1/T^4 versus the cosine of the angle will be plotted and related to the equation of a straight line graph to calculate the acceleration due to gravity.

Uploaded by

Justin Mahabir
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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In this experiment you will investigate how the period, T, of oscillation of a bent metal

wire varies with the angle between the straight arms of the wire, θ, and to calculate
acceleration due to gravity, g.

Method:

1) Secure the cork in the clamp of the retort stand so that the pin is mounted
horizontally.
2) Measure the length, L of the wire.
3) Make a sharp bend in the wire at its centre so that the angle , between the straight
parts of the wire is about 150°.
4) Measure and record this angle  using a protractor.
5) Suspend the wire from the pin and displace the wire from its equilibrium position
and release it so that it performs small oscillations in the vertical plane as shown in
Figure 1 above.
6) Make suitable measurements to determine the period T of oscillation.
7) Remove the wire from the pin and vary its angle by gentle bending the wire so that
30°≤≤150°, and repeat steps 3-6 until 6 sets of readings are obtained.

Treatment:

1) T and are related by the equation


1
= 𝐴𝑐𝑜𝑠θ + B
𝑇4
where A and B are constants.
1
Plot a graph of 𝑇 4 vs cos θ

2)Relate the above equation to the equation of a straight line graph.

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