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EXPERIMENTS — EXPLORING THE FACTORS
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I used the second method in my Kitchen Experiments to examine the effect of various
factors on the angle of repose. These are particle size, angularity of particles, and
water content.
Experiment on Particle Size
In this experiment, particles of three different sizes were used. They were sand, small
gravel and large gravel.
 |
 |
 |
| Sand |
Small gravel |
Large gravel |
 |
Sand |
 |
| Particle size about 0.5mm |
|
Angle of repose — 33° |
 |
Small gravel |
 |
| Particle size about 12mm |
|
Angle of repose — 45° |
 |
Large gravel |
 |
| Particle size about 20-30mm |
|
Angle of repose — 52° |
A Comparison Table
| Particle type |
Particle size |
Angle of repose |
| Sand |
Approx. 0.5mm |
33° |
| Small gravel |
Approx. 12mm |
45° |
| Large gravel |
Approx. 20-30mm |
52° |
Conclusion: Angle of repose increases with the size of particles.
