By Brittany and

Alyssa

Fair testingwith

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 – 2.530

• The used cotton hair tie WON!

CONCLUSION

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

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