A 240-kg uniform rectangular plate is supported in the position shown in the figure by hinges A and Band by a cable DCE that passes over a frictionless hook at C. Assume that the tension is the same in both parts of the cable and that hinge B does not exert any axial thrust. D 960 mm E 450 mm A 90 mm 675 mm B 690 mm 90 mm 270 mm Draw the free-body diagram required to determine the tension in the cable. (You must provide an answer before moving on to the next part.) Cable DCE is a single cable.

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Determine (A) the tension in the cable (B) the reactions at A and B

 

Please do not forget to include the free body diagram.

## Problem Description

A 240-kg uniform rectangular plate is supported in the position shown in the figure by hinges A and B and by a cable DCE that passes over a frictionless hook at C. Assume that the tension is the same in both parts of the cable and that hinge B does not exert any axial thrust.

### Diagram Explanation

The diagram illustrates a rectangular plate positioned horizontally. It is supported by two hinges, labeled A and B, which are attached to the underside of the plate. There is also a cable labeled DCE, creating tension support at three points: D, C, and E.

### Dimensions and Positions

- The plate is positioned within a 3D coordinate system with x, y, and z axes.
- Length from hinge A to the edge of the plate in the z-direction is 90 mm.
- Total length in the x-direction from C to the end of the plate is 690 mm.
- The plate extends 90 mm from hinge B to its edge in the z-direction.
- Cable DCE distances:
  - CD is 450 mm from point A.
  - CE is 675 mm in the x-direction from point A.
- Cable positions:
  - D is directly above the plate, 960 mm from AC in the x-direction.
  - E is also above the plate, 675 mm from AB in the x-direction.

### Task

Draw the free-body diagram required to determine the tension in the cable. Note that the cable DCE acts as a single cable.

### Key Considerations

- Center of mass located at the center of the plate, given it's a uniform rectangular plate.
- Since points D, C, and E are connected by a cable, the tension throughout the cable is consistent.
- Assume that hinge B exerts no axial thrust, simplifying calculation of forces. 

This problem requires understanding moments, forces, and equilibrium in three dimensions, as well as interpreting spatial diagrams for mechanical systems.
Transcribed Image Text:## Problem Description A 240-kg uniform rectangular plate is supported in the position shown in the figure by hinges A and B and by a cable DCE that passes over a frictionless hook at C. Assume that the tension is the same in both parts of the cable and that hinge B does not exert any axial thrust. ### Diagram Explanation The diagram illustrates a rectangular plate positioned horizontally. It is supported by two hinges, labeled A and B, which are attached to the underside of the plate. There is also a cable labeled DCE, creating tension support at three points: D, C, and E. ### Dimensions and Positions - The plate is positioned within a 3D coordinate system with x, y, and z axes. - Length from hinge A to the edge of the plate in the z-direction is 90 mm. - Total length in the x-direction from C to the end of the plate is 690 mm. - The plate extends 90 mm from hinge B to its edge in the z-direction. - Cable DCE distances: - CD is 450 mm from point A. - CE is 675 mm in the x-direction from point A. - Cable positions: - D is directly above the plate, 960 mm from AC in the x-direction. - E is also above the plate, 675 mm from AB in the x-direction. ### Task Draw the free-body diagram required to determine the tension in the cable. Note that the cable DCE acts as a single cable. ### Key Considerations - Center of mass located at the center of the plate, given it's a uniform rectangular plate. - Since points D, C, and E are connected by a cable, the tension throughout the cable is consistent. - Assume that hinge B exerts no axial thrust, simplifying calculation of forces. This problem requires understanding moments, forces, and equilibrium in three dimensions, as well as interpreting spatial diagrams for mechanical systems.
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