True or False 1.) In a statically determinate structure, the number of independent unknowns must be equal to the number of equations based on static equilibrium conditions. 2.) A planar structural system is in a state of static equilibrium when the resultant of any force and any moment is equal to zero. 3.) The effect of the force in a body is defined to be the product of the body weight and the acceleration of the force. 4.) The Principle of superposition states that the effect of a number of loads applied at the same time is the algebraic sum of the effects of the loads applied singly.

Q: A rectangular tube has an outside width of 100 mm, an outside depth of 150 mm, and a wall thickness…

A: σ=MyII=BH312-bh312=100×150312-80×130312=13478333.33mm4M=1.4k-m

Q: A у C n 60° х 40⁰ и B F = 800 lb

A: A force of 800 lb acting at 40° with rod which is inclined at angle 60° to the horizontal.

Q: correct? o Compared to Gas, liquid has very small cohesive force. Therefore, liquid can form a free…

A: Option A is correct ( Statement A is wrong )  Compared to Gas, liquid has very small cohesive force.…

Q: Two elastic bodies made of different materials are placed in a rigid cavity and their surfaces are…

A: The elastic modulus is the slope of its stress-strain curve in the elastic deformation region.…

Q: A у C n 60° x 40° B F = 800 lb

A:

Q: Calculate the forces in members BC, BE, and EF. Solve for each force from an equilibrium equation…

A: Given Truss is asked to analyse to find forces in the members of BC, BE, EF By  using method of…

Q: The mass of a block m = 4.59 kg has part of its volume submerged in a beaker of water. The block is…

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Q: Calculate the forces in members BC, BE, and EF. Solve for each force from an equilibrium equation…

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Q: A 4-meter-long steel plate with a rectangular cross section (10×50) mm is resting on a frictionless…

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Q: Calculate the forces in members BC, BE, and EF. Solve for each force from an equilibrium equation…

A:

Q: Problem 1.2 The line of action of the 3000-lb force runs through the points A and B as shown in the…

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Q: NOTE: 1. The following are grounds for not considering your solution and final answers: a)Figures…

A: Truss is a pin-jointed structure that always resists the forces by the reaction at the support and…

Equilibrium and Support Reactions

Civil engineers deal with structures that are composed of several members connected or with individual members such as beams and columns. To analyze such structures, the condition of statics must be applied. Under the static condition, the members are considered to be in equilibrium under the action of forces, that is, the members are assumed to be having negligible velocity.