Final answer:
The questions are related to Physics and involve understanding and applying concepts such as force, friction, free-body diagrams, and material deformation within the field of mechanics.
Step-by-step explanation:
The questions mentioned involve the application of forces and mechanics, which is a topic within Physics. For instance, when a pipe assembly is subjected to a force and the conditions involved, such as friction and the force exerted by a nurse to move a system at a constant velocity, require an understanding of Newton's laws of motion and statics and dynamics concepts.
To solve these problems, you would typically start by drawing a free-body diagram to visually represent the forces acting on an object. Then you would apply Newton's second law of motion (F = ma) to solve for the unknowns, like the force exerted or the acceleration of the system. If dealing with a situation where equilibrium is maintained, you would set the net force to zero and solve accordingly.
For systems in equilibrium, we can also use vector resolution to determine the components of individual forces and the resultant force, as in the case of the barge being pulled by tugboats. Similarly, understanding the mechanical properties of materials helps us determine deformations, such as shear deformation of a spinal disk due to a shearing force, using the shear modulus.
The complete question is: The pipe assembly is subjected to a force of 600 N at B . Determine the resultant internal loadings acting on the cross section at point C .