Research Article
Physical and Mechanical Properties of Selected Common Beans (Phaseolus vulgaris L.) Cultivated in Tanzania
Table 6
Coefficients of friction for un-threshed beans pods.
| S/N | Material | Angle (degrees) | Coefficient of friction | Min | Max | Min | Max | Average |
| 1 | Plywood | 30 | 36 | 0.58 | 0.74 | 0.65 |
| 2 | Plastic | 29 | 34 | 0.55 | 0.67 | 0.61 |
| 3 | Mild Steel | 28 | 33 | 0.53 | 0.65 | 0.59 |
| 4 | Aluminium | 25 | 30 | 0.47 | 0.58 | 0.52 |
| 5 | Stainless Steel | 23 | 28 | 0.42 | 0.53 | 0.48 |
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