Q1) A band and block brake having 14 blocks each subtending and angle of 15° at the center is applied to a drum of 1.12 m effective diameter. The drum and the flywheel mounted on the same shaft have a mass of 1600 Kg and combined radius of gyration of 800 mm. The two ends of the band are attached to pins on opposite sides of the brake lever at a distance of 30 mm and 120 mm from the fulcrum. If a force of 500 N be applied at a distance of 700 mm from the fulcrum f the lever, determine: 1) The maximum braking torque. 2) The angular retardation of the drum. 3) The minimum time taken and the revolutions made by the drum to come to rest from the rated speed of 450 rpm, µ=0.28 4) For the above kind of the braking system, show that 1+ u tan 0 1-u tan 0 T, T, Where: T: Tension in the tight side T: Tension in the slack side

Q1) A band and block brake having 14 blocks each subtending and angle of 15° at the center is applied to a drum of 1.12 m effective diameter. The drum and the flywheel mounted on the same shaft have a mass of 1600 Kg and combined radius of gyration of 800 mm. The two ends of the band are attached to pins on opposite sides of the brake lever at a distance of 30 mm and 120 mm from the fulcrum. If a force of 500 N be applied at a distance of 700 mm from the fulcrum f the lever, determine: 1) The maximum braking torque. 2) The angular retardation of the drum. 3) The minimum time taken and the revolutions made by the drum to come to rest from the rated speed of 450 rpm, µ=0.28 4) For the above kind of the braking system, show that 1+ u tan 0 1-u tan 0 T, T, Where: T: Tension in the tight side T: Tension in the slack side

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A wheel is attached by a cable to a block The wheel has a radius of 2ft and weighs 300lbs, the block weights 20lbs. If the radius of gyration about the point of rotation of the disk is 1.5ft, how many revolutions will it take for the wheel to come to a stop assuming it was moving at 10 rad/s CW. Assume the block is on the left side of the wheel and thus causes a CCW moment.
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I need the answer as soon as possible
A pair of rods and disc form a triangle with a spring (a spring connects A to C). The spring has a spring constant of 20 N/m and an unstretched length of 1.5m. each rod has a length of 3m and a mass of 10kg. The disk has a mass of 5kg, a radius of .5 and rolls without slipping. The system starts with an angle between the spring and rods of 60 degrees, determine the angular velocity of the rods after it has dropped to a 30 degree angle.
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Subject: Mechanics of machinery
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