Create a sinusoidal graph: The following methods of producing a sinusoidal graph may be used as teacher demonstrations. Method 1 could also be used as a group activity.
Method 1:
| Attach a pen, pencil, or marker to a plum bob at the end of a string. Hold over a sheet of paper so that the pen just touches the paper. Start a pendulum swing with a small, easy motion. As the pendulum swings across the paper, pull the paper with a constant velocity. The pendulum will create the path of a sinusoidal wave. |
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Method 2:
| Securely attach a piece of string to a solid surface. Tying the string to an existing knob or latch will work well. Attach the other end of the string to the blade of a sabre saw and pull the string taut. Start the sabre saw. The vibrating blade will produce a sinusoidal wave in the string. |
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