A laboratory freight elevator, including its load, has a mass of 500 kg. It is prevented from rotating by the track and wheels mounted along its sides. The elevator is used to carry highly sensitive equipment so it cannot exceed an acceleration of 3 m/s2 . A geared motor is used with the cable/pulley system shown below to raise and lower the elevator. The motor turns gear A with a constant angular acceleration, αA. The gears of the motor have the following radiuses: RA = 75 mm, RB = 200 mm, RD = 100 mm a) Determine the maximum angular acceleration of gear A, αAmax. b) Determine the tension in the cable, T, at this maximum acceleration.
A laboratory freight elevator, including its load, has a mass of 500 kg. It is prevented...