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Teachers' notes
Here are two ways of studying drag in the laboratory. You will need
steel ball bearings of different sizes. You could also try glass marbles.
Method 1
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Drop ball bearings of different sizes into a tall glass cylinder of water.
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Race them, or time them as they fall.
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Modify them with modelling clay to alter the drag on them.
Method 2
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Place a gently-sloping ramp in a sink full of water.
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Release ball bearings so that they roll down the slope.
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Race them or time them.
Use magnets to hold steel ball bearings before you release them, or to
rescue the ball bearings from the water. |
