3. Results

3.1 Sampling sites

Lecture Theatre, Biotech Lab, Staircase and empty space outside BioTech Lab, Staircase between S4-05 and S2-08.

3.2 Experiment 1 results

No. of Ankle Weights	0	1	2	3	4	5	6	7	8
Distance Travelled (cm) First Try	-Na-	-Na-	-Na-	90.5	241.5	332.0	302.0	302.0	423.0
Distance Travelled (cm) Second Try	-Na-	-Na-	-Na-	181.5	241.5	210.0	287.5	362.5	302.0
Distance Travelled (cm) Third Try	-Na-	-Na-	-Na-	181.5	241.5	181.0	262.5	301.5	423.0
Average	-Na-	-Na-	-Na-	151.2	241.5	241.0	302.0	322.0	382.7

3.3 Experiment 2 results  

Amount of ankle weights	0	1	2	3	4	5	6	7	8
Distance Travelled (cm) First try	-Na-	-Na-	-Na-	151.0	272.0	362.5	241.5	453.5	422.5
Distance Travelled (cm) Second try	-Na-	-Na-	-Na-	181.0	181.0	393.0	241.5	181.0	362.5
Distance Travelled (cm) Third Try	-Na-	-Na-	-Na-	120.5	181.0	302.0	301.5	301.5	330.5
Average	-Na-	-Na-	-Na-	150.8	211.3	352.5	261.5	312.0	371.8

3.4 Experiment 3 results

Amount of ankle weights	0	1	2	3	4	5	6	7	8
Distance Travelled (cm) First try	-Na-	-Na-	-Na-	151.0	272.0	241.5	322.5	332	423.0
Distance Travelled (cm) Second try	-Na-	-Na-	-Na-	151.0	181.0	332.0	241.5	362.5	423.0
Distance Travelled (cm) Third Try	-Na-	-Na-	-Na-	121.0	241.5	302.0	302.0	0.0	362.5
Average	-Na-	-Na-	-Na-	141.0	231.5	291.8	288.7	231.5	402.8

3.5 Graphs

3.5 Special observations  

1 Ankle Weight is 0.25 kg

-Human Error

Since we are not using mechanics, human errors occurred.

When the projectile was released, the eraser hit the base of the trebuchet. Thus, it was not released properly.

-Extra Investigation

We wanted to know the maximum weight the counterweight can withstand.

The maximum weight the counterweight can withstand would be 11 weights.

Amount of Ankle Weights	9	10	11
Distance travelled (cm)	483.5	362.5	-NA as rod had bent-

-Not enough weight

We found out that 0-3 weights used were not able to be tested as the weight was too little and there was too little energy to make the eraser travel properly. Therefore we put Not Applicable (NA) in the tables.