2.) A roller mechanism R with radius 25 cm is connected to a cord as demonstrated...

 

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2.) A roller mechanism R with radius 25 cm is connected to a cord as demonstrated in Fig. 2. The cord is wrapped around a groove that is 15 cm away from the mass centre of the roller. The roller is initially standing at rest on a declined surface (ß = 20⁰). R В Figure 2 Noting that the mass of the roller is 75 kg, and its radius of gyration about its mass center is 0.2 m, and taking us = 0.4 and uk = 0.3; a) Calculate the roller's angular velocity, 5 seconds after it is discharged [28%]. b) Discuss three ways or system adjustments that could be made, to increase this angular velocity value at this position [9%]. 2.) A roller mechanism R with radius 25 cm is connected to a cord as demonstrated in Fig. 2. The cord is wrapped around a groove that is 15 cm away from the mass centre of the roller. The roller is initially standing at rest on a declined surface (ß = 20⁰). R В Figure 2 Noting that the mass of the roller is 75 kg, and its radius of gyration about its mass center is 0.2 m, and taking us = 0.4 and uk = 0.3; a) Calculate the roller's angular velocity, 5 seconds after it is discharged [28%]. b) Discuss three ways or system adjustments that could be made, to increase this angular velocity value at this position [9%].

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FBD of disc Assuming rolling without slipping forward direction mgsin ... View the full answer