By Brittany and Alyssa Fair testing with flying hair ties

AIM Our aim is to find out which hair ties stretcher by flinging them with a sling-shot.

PREDICTION The used hair ties are longer, so there is more time for friction to slow it down and it will drop faster.

METHOD Step 1: Make a sling-shot out of the sticks. Step 2: cut the extra hair tie and tie it at the top of the sling-shot. Step 3: Put the 15cm ruler at the joint of the sling-shot.

METHOD CONTINUED Step 4: Get 1 of the hair ties and pull it back around the cut hair tie to the 15cm mark and let go. Step 5: Measure how far the hair tie went with the 1 metre long rope and record the measurement.

RESULTS Used cotton hair tie – 5.350metres New cotton hair tie – 3.57metres Stretched hair tie – 2.200metres New hair tie – The used cotton hair tie WON!

CONCLUSION In conclusion the used cotton hair tie went the longest distance and came 1 st with the unused cotton hair tie coming 2 nd.

VARIBLES The person flinging the hair ties THE HAIR TIES The distance you pull back on the sling- shot

EQUIPMENT x2 stretchy hair ties (1 used 1 not) x2 cotton hair ties (1 used 1 not) x1 extra hair tie x2 short sticks x1 long stick x1 tape measure A lot of cello tape