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Physics Form 4 Chapter 2 Force and Motion I

Eksperimen 2.1
Experiment 2.1
Eksperimen 2.1
Problem statement: What is the relationship between mass and inertia?
Aim: To investigate the relationship between inertia and mass.

Inference: The inertia of an object is influenced by its mass.
Hypothesis: The inertia of a body increases when its mass increases.
Variables:
(a) Manipulated variable : Mass
(b) Responding variable : Inertia
(c) Fixed variable : Type of hacksaw blade
Operational Definition: Chapter
Period of oscillation is an indicator for inertia, the responding variable. The bigger the period of
oscillation, the bigger the inertia. 2
Apparatus and material: Hacksaw blade, G-clamp, stopwatch, and plasticine
Procedure:
1. A hacksaw blade is clamped with a G-clamp to the leg of a table as shown in Figure 2.47.
2. A lump of plasticine with a mass of 30 g is attached to the
free end of the hacksaw blade. G-clamp
3. The hacksaw blade is displaced sideways slightly and
released so that it would oscillate horizontally.
4. The time taken for 10 complete oscillations, t 1 , is determined
using a stopwatch and recorded. This step is repeated for Plasticine
another reading t 2 . The readings of t 1 and t 2 are recorded in
Table 2.4.
5. Steps 3 and 4 are repeated with mass of plasticine, m = 40
g, 50 g, 60 g and 70 g. Hacksaw
Table leg blade
6. A graph of period against mass is drawn.
Figure 2.47
Results:
1. Tabulation of results.
Table 2.4
Time taken for 10 oscillations / s
Mass of plasticine, t
m / g Period, T = 10 / s
t 1 t 2 Average, t
30 4.1 4.1 4.1 0.41

40 4.8 4.8 4.8 0.48

50 5.5 5.4 5.5 0.55
60 6.0 6.1 6.1 0.61

70 6.5 6.5 6.5 0.65

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