a) If a pulley with a diameter of 3 cm is selected, and it is assumed to be 100% efficient, what torque will be required by the pulley to lift the 3 kg mass?

b) What gear ratio is required so that the 3 kg mass is lifted while the motor is operating at maximum efficiency. Assume the gearbox will have an efficiency of 95%.

c) At what velocity will the mass be lifted in this system?

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Table 1: Data for the 12 V motor Nominal Voltage = 12 V Speed (rad/s) Torque (N.m) Current (A) No Load 66 0.1 Maximum Efficiency 54 0.014 0.17 Stall 0.055 1.2 Table 1: Data for the 12 V motor Nominal Voltage = 12 V Speed (rad/s) Torque (N.m) Current (A) No Load 66 0.1 Maximum Efficiency 54 0.014 0.17 Stall 0.055 1.2

Answer rating: 100% (QA)

a Torque required by pulley b Power supplied by motor at 100 efficiency P moto... View the full answer