Describe how a helical spring may be used to determine the acceleration due to gravity.
Setup
- Suspend a spiral spring from the clamp of a retort stand.
- Attach the pointer to the free end of the spring such that it is horizontal.
- Read and record the initial pointer position on a meter rule supported vertically.
- Suspend a mass, m, from the spring and record the new position of the pointer and calculate the extension, x, of the spring
- Displace the mass, m, through a small vertical distance and release it.
- Measure the time, t, for a reasonable number, n, of oscillations; for instance, 20 oscillations.
- Calculate the period, T = t/n of oscillations. Repeat the procedure for different value of masses.
- Plot a graph of T2 against x, and find the slope, S, of the graph
Sources of error
- Reading positions of the pointer
- Determining time for the specified number, n, of oscillations
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Dr. Bbosa Science
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