Paper 3
Section B
• Diagram 3.5 shows two catapults A and B made from same catapult rubber. Difference forces are applied on the catapults.
A B
Inference: extension of the spring depends on the weight of object.
Hypothesis:The bigger the weight, the longer the spring extension
Aim of the experiment: To determine the relationship between the weight and the spring extension
Variables:Manipulated: Weight of the loadResponding: Spring extensionConstant: Spring constant
Apparatus and Materials: Spring, pin, weights, plasticine, retort stand, metre rule
Arrangement:
Variables : Air pressure , Temperature.Manipulated :Responding : Constant :
temperatureAir pressureVolume of air
inference
RV depends on MV // MV affects RV
affects temperatur
e air pressure
hypothesis
•When increases, , increases
Temperature
Air pressure
aim
To investigate the relationship between
and
temperature
pressure
Method of controlling manipulated variable
• Manipulate variable : temperaturecontrol : the first temperature
Heat up the water to 20 0C
Method of measuring responding variable
• Responding variable : pressure
• Measure pressure using : Bourdon gauge
Using Bourdon gauge , measure the pressure and record the data
Analyse data
Temperature / K Pressure / Nm-2
20
3040
50
60
Graph
Temperature / K
Pressure / Nm-
2