Which of the following gives the nearest value for the maximum deflection of the spring, in mm? a. 72.5 b. 70 c. 67.5 d. 75
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Which of the following gives the nearest value for the maximum deflection of the spring, in mm?
a. 72.5
b. 70
c. 67.5
d. 75
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- The 600-lb cable spool is placed on a frictionless spindle that has been driven into the ground. If the force required to start the spool rotating is F = 160 lb, determine the coefficient of friction between the ground and the spool. Neglect the diameter of the spindle compared to the diameter of the spool.The leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.The coefficient of static friction between the 50-kg crate and the ramp is μs = 0.35. The unstretched length of the spring is 800 mm, and the spring constant is k = 660 N/m. Determine the following: 1 The normal force acting on the crate is Blank 1 N. 2 The friction force acting on the crate is Blank 2 N. 3 The minimum value of x at which the crate can remain stationary on the ramp is Blank 3 mm.
- In the photo, the man has a mass of 60 kg and the crate has a mass of 100 kg. The coefficient of static friction between his shoes and the ground is μs = 0.4 and between the crate and the ground is μc = 0.3. a) Determine if the man is able to move the crate using the rope-and-pulley system shown. b) Prove your answer to part A by calculating the static frictional force F between the man's shoes and the ground required to move the crate and the maximum static frictional force Fmax which can be developed. Express your answers in newtons to three significant figures separated by a comma.1 The uniform dresser has a weight of 85 lb and rests on a tile floor for which μs = 0.28. If the man pushes on it in the direction θ = 30°, determine the smallest magnitude of force F needed to move the dresser. 2 The uniform dresser has a weight of 93 lb and rests on a tile floor for which μs = 0.26. If the man has a weight of 150 lb and pushes on it in the direction θ = 30°, determine the smallest coefficient of static friction between his shoes and the floor so that he does not slip.The angle of static friction between the block with mass M and the plane is ∅ . Show that the minimum value of P for a given angle θ is 9.8M sin (θ + ∅).
- Two blocks A and B have a weight of 10 lb and 6 lb, respectively. They rest on the inclined plane whose coefficients of static friction are A=0.15 and B 0.25 respectively. Determine the angle of inclination X for which both blocks begin to slide. Also find the required elongation or compression in the spring connecting them for this to occur. The spring has a stiffness of k 2 lb/ft.Determine the required Weight of block A so that block B will impend upward, assuming that a -N the 740 -Newton force acts perpendicular to block A. The weight of the block B is 540 coefficient of friction between block A and the wall, as well as block B and the inclined floor is 0.4, with respect to the whereas 0.25 for the fixed drum and rope. The floor is inclined at horizontal plane. 30° 540 B. A 740 ( 30)°In a porter governor the mass of the central load is 18 kgand the mass of each ball is 2kg. the top arms (250+X) mm while the bottom arms are (300+X) mm long. The friction of the sleeve is 20 N. If the top arms make 45 deg with the axis of rotation in the equilibrium position, find the range of the speed of the governor in that position Note X is the student roll no. for example if the student roll no is A20 then X=20
- The 150 Newton weight is attached to a rope that passes over two fixed Cylinders A & B. The coefficient of Static Friction between the rope and the cylinders is 0.3. Determine the smallest Force P that keeps the system at rest.A man is pushing a refrigerator initially at rest up a 20 degree incline. He pushes with a force of 90 N parallel to the incline. The weight of the refrigerator is 80 N. The coefficient of non-sliding and sliding friction is 0.4 and 0.3 respectively. Point A is designated to be the lower right corner of the refrigerator. For what value of P will the refrigerator start to slide upwards? For what value of P will the refrigerator start to tip forward? What is the state of motion of the refrigerator?The crate has a weight of W = 350 lb, and the coefficients of static and kinetic friction are μs = 0.3 and μk = 0.2, respectively. Determine the friction force on the floor if θ = 47.4° and P = 105 lb.