In a Whitworth quick return motion, as shown in Fig. OA is a crank rotating at 30 rpm in aclockwise direction. The dimensions of various links are: OA = 150 mm; OC = 100 mm; CD =125 mm; and DR = 500 mm.Determine the acceleration of the sliding block R and the angular acceleration of the slottedlever CA.D10045A500R

Answered: Image /qna-images/answer/e3d24bd1-6302-474d-aca4-7c68f9316be4.jpg

Answered: In a Whitworth quick return motion, as…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q2. Calcualte the magnitude of the couple moment acting on the steel bar shown in the diagram below. 100 N X 1m 2 m Z 2.5 m 2m 100 N y
PROBLEM 2: An L-shape bracket shown on Figure SRB 002 is fixed at point O with an applied force of 90 Newton A. Given at the angle 8 with respect to vertical axis, calculate the following: a) If 0 = 15 degrees, what is the moment at point O? b) What is the value of 0 so that the moment about point O is zero? 800 mm 0 F = 90 N 600 mm Figure SRB 002 A
A rod 3.5 feet long rotates in a horizontal plane about a vertical axis through its center. At each end of the rod is fastened a cord 6 ft. long. Each cord is inclined at Ø = 450 with the vertical and supports a weight of 45 lbsA. Which of the following gives the speed of rotation “n” in rpm?a) n = 25.12 rpm b) n = 25.12 rpm c) n = 30.20 rpmd) n = 22.13 rpm B. What is the tension in the 5 feet long cord? a) T = 58.47 lbb) T = 63.63 lbc) T = 51.78 lb d) T = 48.25 lb
A horizontal beam ABC is loaded as shown in the figure below. The distance of the point of contraflexure from end A (in m) is 10kN (327) Ag 0.75m B C k D 1m -
The wheels of the refrigerator of the figure are stuck and will not turn. The refrigerator weighs 600 N. Assume a coefficient of friction between the wheels and the floor of 0.6 and determine the force necessary to cause the refrigerator to just start to move (impending motion). Also determine the maximum height h at which the force can be applied without causing the refrigerator to tip over.
A rod ABC rotating at 20rpm about a vertical axis through A supports a 200-lb ball its lower end as shown in the figure below. It is fixed in position by the rod BD. Neglecting the weights of rods AC and BD, compute the force F in rod BD. IS the force tensile or compressive? At what rpm this force be zero?
Try to calculate the Fixed-end Moment (FEM) shown in the figure below
PROBLEM 2: The crank shown is free to rotate at B about the x-axis only. Given the following dimensions: y X₁ = 54 cm X₂ = 26 cm Y₁ = 75 cm Z₁ = 30 cm Z B Y₁ X₂ Z₁ A 100-N force is applied at A with the following spatial angles: From positive x-axis: a = 65⁰° From positive y-axis: B = 120⁰ It is known that the angle from positive z-axis is obtuse, 90° ≤ y ≤ 180⁰ 1. Determine the moment about B due to the applied force at A (in vector component form) 2. Determine the component of the force along line AB. 3. Find the angle between the force applied and its component along line AB. "
4) While trying to change a tire, the driver shown below applies a force, P, of 25 Ibs at each end of the lug wrench. The lug wrench is made of solid steel with a circular cross-section of 0.5" and has a shear a) Use statics to calculate the amount of torque at point A of the wrench in Ib-in. Remember that the force is applied on both sides. [Ans. to Check: 450 lb-in] modulus of 11,400 ksi. c) The allowable shear stress in the wrench is 25 ksi. Determine the Factor of Safety (FOS) against yield. b) Calculate the maximum shear stress that the driver would apply to the lug nut at A (in ksi). [Ans. to check: 18.3ksi] d) Find the angle of twist in radians at the same location. Assume the wrench is symmetrical and that it is 9" from the center of the wrench to point A. 9.0 in. 9.0 in. A d = 0.5 in. P = 25 lb
Please read instructions carefully. Especially ”change the steel shaft from solid cross-section to tubular cross section’’.
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