Pulley A | Pulley B | |
Purpose?. | Driving | Driving |
Diameter?. | 450 mm | 750 mm |
Angle of contact?. | \[{{\theta }_{A}}\,=\,150\] | \[{{\theta }_{B}}\,=\,210{}^\circ \] |
Coefficient of friction between belt and pulley | \[{{f}_{A}}\,=\,0.36\] | \[{{f}_{B}}\,=\,0.22\] |
A) \[{{f}_{A}}{{\theta }_{A}}\]
B) \[{{f}_{B}}{{\theta }_{B}}\]
C) \[({{f}_{A}}+{{f}_{B}})\,({{\theta }_{A}}+{{\theta }_{B}})/4\]
D) \[({{f}_{A}}{{\theta }_{A}}+{{f}_{B}}{{\theta }_{B}})/2\]
Correct Answer: B
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