Question (1):(16 marks) The arm ABC of an industrial robot is supporting a load 200 N at C. The arm ABC has a uniform distributed mass 30 kg/ m, and pin connected at A and connected to a hydraulic cylinder BD in the stationary position shown in the Figure. It is required to: i) Calculate the reactions at pins A and B.(3 marks) ii) Draw the normal, shear and bending moment diagrams for arm ABC, and illustrate the values at the ends and supports.(4 marks) iii) If arm ABC has a T-cross section shown in the figure, calculate maximum normal stress at the critical section.(6 marks) iv) Calculate the maximum transverse shear stress at the critical section.(3 marks)
Added by Gregg D.
Close
Step 1
1. Determine the total weight of the arm ABC: - Length of ABC = 2 m - Mass per unit length = 30 kg/m - Total mass = 30 kg/m * 2 m = 60 kg - Total weight = 60 kg * 9.81 m/sĀ² = 588.6 N 2. Calculate the moments about point A to find the reaction at B: Show moreā¦
Show all steps
Your feedback will help us improve your experience
Adi S and 71 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Madhur L.
The figure below shows the arm of a person holding a weight, W, in the hand. The lower arm is horizontal. The elbow is bent with an angle of 100Ā° between the bones in the upper and lower arm. (Note that the angle is greater than 90Ā°). The angle between the muscle force and the lower arm is 73Ā°. The mass of the object that the person is holding is 14 kg. Assume that the weight of the arm is negligible compared to the weight held. (a) Draw a diagram showing all the forces acting on the lower arm. (1 mark) (b) Would the horizontal force components cause a torque about the elbow joint? Explain why or why not. (1 mark) (c) Give expressions for the components of the forces acting on the lower arm in terms of their magnitudes. (1.5 marks) (d) By considering the torque acting about the elbow joint, determine the magnitude of the muscle force. (1.5 marks)
Ethan D.
The industrial robot is held in the stationary position shown. Draw the shear and moment diagrams of the arm $A B C$ if it is pin connected at $A$ and connected to a hydraulic cylinder (two-force member) $B D$. Assume the arm and grip have a uniform weight of $1.5 \mathrm{lb} / \mathrm{in}$. and support the load of $40 \mathrm{lb}$ at $C$.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD