20040 AC Science Year 4 Physical sciences
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Force and distance<br />
Work with a partner to complete the following investigation to find out if<br />
increasing distance increases force.<br />
Materials:<br />
• metal or plastic tray<br />
• large sheet of paper<br />
• glue<br />
• marble • soft modelling clay<br />
• scissors • marker pen<br />
• chair or small stepladder<br />
• ruler<br />
• Blu-tack <br />
I. Steps:<br />
O Make a paper ruler 200 cm long and 15 cm wide. Mark and label 0 cm,<br />
30 cm, 60 cm, 90 cm, 120 cm, 150 cm and 180 cm on it.<br />
2.<br />
f) Vertically attach your ruler to the wall, with 0 cm mark at floor level.<br />
E) Put a thick, flat layer of clay inside the tray, and place it on floor.<br />
Prediction: What will happen as the marble drops from different heights?<br />
3. Experiment: Drop the marble into the tray from the<br />
different heights given in the table, measure the size<br />
of the dent and record your results.<br />
Distance Dent size Distance Dent size<br />
30cm<br />
60cm<br />
90cm<br />
120cm<br />
150cm<br />
180cm<br />
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4. What happened when you increased the distance of the drop?<br />
5. Conclusion: What did the size of the dent tell you about the force on the<br />
marble?<br />
6. Reflection: Use the back of the worksheet to record any difficulties you<br />
had with the experiment. List any improvements you would make if you<br />
repeated the activity. Was this a fair test? Explain your answer.<br />
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AUSTRALIAN<br />
CURRICULUM SCIENCE (<strong>Year</strong> 4)
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