Question 1 A 125 kg electric motor and a 505 kg reciprocating compressor are mounted on a common support. The motor runs at 2402 revolutions/minute (rpm) and by a belt drives the compressor at 3600 rpm. It is found that the vertical force fed to the support is excessive. Choose four equal springs to provide a force transmissibility not exceeding 4%.
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- The force P applied to the brake handle enables the band brake to reduce the angular speed of a rotating drum. If the tensile strength of the band is 3800 lb, find the maximum safe value of P and the corresponding braking torque acting on the drum. Assume that the drum is rotating clockwise.The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the smallest force P and the corresponding angle that would cause impending sliding of the block. The angle of static friction between the block and the ground is s.Dont copy from chegg The disc brakes at the front of a car have pistons of 1582 mm2 cross-sectional area each, whereas the drum brakes at each of the rear wheels have pistons of 300 mm2cross-sectional area. The master cylinder has piston of 582 mm2 cross-sectional area.Determine the total force applied at the front and rear brake cylinders and the ratio in
- (i) Calculate the force applied on the spring.Equilibrium of Concurrent Force System. The piston of a reciprocating engine exerts a force of 175 kN on the crosshead when the crank is 45° (angle B) past TDC. If the stroke of the piston is 800 mm and the length of the connecting rod is 1.80 m, find the guide force and the force in the connecting rod. Hint: 1=½ stroke; Angle o may be solved using Sine Law in AACO. K= Compressive Force in the connecting Rod E= Piston Effort 70 120 F, = Guide Force Fig. P-1 Fig. P-2 a Tools: EF cos0=0; F sin .=0. R = Ev)* + (E#): ; R 771 =- : tane = sin A sin B sin CThe system shown is in static equilibrium and motionless. • The force "P" is at the maximum magnitude that will not initiate motion. NOTE: Submitted responses shall be to 4 significant figures. Do NOT use scientific notation. Find: 1. The magnitude of weight of Block-A is 2. The magnitude of internal force in the rope is N. _N. 3. The magnitude of normal force between Block-A and Block-B is N. 4. The magnitude of friction force between Block-A and Block-B is N. 5. The magnitude of normal force between Block-B and the Ground is 6. The magnitude of friction force between Block-B and the Ground is 7. The magnitude of force P is_N. _N. N. A 100 kg 30° H, = 0.30 200 kg B P -Hy = 0.20
- Problem 6 Compute the reaction forces in B and D. After solving the problem, answer the following question: "Is the force in D directed toward the right or direction? Does it make sense and why?" 8.4 kN f 8.4 kN D 2.8 m 4.5 m 4.5 m left4. A pick-up truck that has a masa of 2.5 metric tons pulla a trailer with a mass of 1 metric ton. The engine of the truck has a pulling capacity of 5kN. The horizontal drawbar used to pull the trailer has a capacity of 600N only. If exceeded will disengage. If the full power of the engine is used wiill the horizontal draw bar disengage or not? Specify you answer if Yes or No explain based on your computationFigure 1 shows a railroad wagon axle and forces acting over it. There are two disc brakes on the wagon axle. Since the wagon wheels are not driven wheels, the load bearing element to which the wheels are connected is called axles. The axle is supported at both ends with bearing A and bearing B and the the weight of the wagon (G) is evenly distributed on both bearings (as G/2). During braking, two disc brakes on the axle are applied Ff force and Ft friction forces are formed on the wheels. Therefore the axle is forced to bend in the vertical direction with the effect of wagon weight (G) and wheel reaction forces (Rt), and in horizontal direction with the effect of braking (Ff) and wheel friction (Ft) forces. At the same time, the axle is forced under torsion because of Ff and Ft forces. GIVEN:Shaft material : 50CrMo4 Wheel material : GS 60 Brake discs’s material: 15Cr3 All the radiuses : 5 mm Average roughnesses for press fit surfaces: Ra =6.3 μm Wheel speed: = 500 d/d Wagon weight per…
- The figure shows a mechanism that raises packages in a transfer mechanism. A 200-N package sits on the horizontal output link O4BD while the crank O2A is rotating at constant speed of 287 rpm CCW. At the position shown the crank OA is vertical and the output link OB is horizontal. we need to determine the torque required from the motor at the crank O2A and the force in member AB The weights of the links are negligible. 50mm 450mm 200 N 200 mm B. 374 mm 300mm X The angular velocity of the link OĄBD in rad/s is = Choose... + The magnitude of the velocity of point D in m/s is = Choose... + The torque required from the motor at the crank O2A in N.m is = Choose... : The force in member AB in N is = Choose... +The figure shows a mechanism that raises packages in a transfer mechanism. A 500-N package sits on the horizontal output link O4BD while the crank O2A is rotating at constant speed of 400 rpm CW. At the position shown the crank OA is vertical and the output link O4B is horizontal. we need to determine the torque required from the motor at the crank 02A and the force in member AB The weights of the links are negligible. 30mm 450mm 500N 220 mm B 374 mm 374 mm The angular velocity of the link O,BD in rad/s is = The magnitude of the velocity of point D in m/s is =A car has hydraulically operated disc brakes at the front and drum brakes at the rear. The frontbrakes have pistons of 58 mm diameter each, whereas each of the wheel cylinder at the rearbrake has 28 mm diameter. The master cylinder piston has diameter of 40 mm. The brake footpedal has a leverage of 4. If the brake pedal is applied a force of 100 N, Calculate (i) The brakingforce on the front axle, (ii) The braking force on the rear axle.