1. Lab-26 AppB Belt Friction
Engineering 36
Lab-26 AppB Belt Friction
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer

2. Sticky Collar Collar B of weight W can slide along bearing Rod
ks = 1.5 kN/m
µs = 40%
Collar B of weight W can slide along bearing Rod
Spring UNstretched for θ = 0°
Find Range of Values for W for equilibrium when
θ = 20° and θ = 30°

7. Rotating Roller
Bucket A connected to Block C by cable that passes over Roller B
Drum B rotates CounterClockwise slowly at a constant rate
The Coefficients of Friction at All Surfaces
µs = 35% µk = 25%
Find smallest Bucket Wt, W, for which Block C will
a) Remain at REST
b) be ABOUT to move UP the InCline
c) Continue to move UP the Ramp at a CONSTANT speed

12. Sticky Collar
85kg
µs = 40%
Given Geometry and 85kg Motor; the mount has negligible weight
The motor Wt on the Pivoted mount maintains the tension in the Flat Drive Belt
µs for the Belt and Drums A & B is 0.40
Find Largest Torque, T, which can be transmitted to Drum B when Drum A rotates Clockwise