PS(12/09/24): (2)Describing Static Principles

What type of support allows movement in one direction and is often used in beam bridges to account for thermal expansion?

• Roller Support

• Pin Support

• Fixed Support

• Hinged Support

Which type of support prevents translation in all directions but allows rotation, and is commonly used in doors or certain bridge supports?

• Roller Support

• Pin Support

• Fixed Support

• Sliding Support

What type of support restricts all movement and rotation, and is used in embedded columns or fixed beams in buildings?

• Roller Support

• Pin Support

• Fixed Support

• Flexible Support

What type of support would you use for a bridge that needs to expand and contract with temperature changes?

• Fixed support

• Roller support

• Hinged support

• Cantilever support

What type of support is recommended for a bridge that needs to expand and contract with temperature changes?

• Fixed support

• Roller support

• Hinged support

• Cantilever support

What is the center of gravity (CG) in statics?

• The point where the entire weight of an object acts

• The point where an object is heaviest

• The point where an object is lightest

• The point where an object is balanced on a scale

For symmetric objects with uniform density, where is the center of gravity located?

• At the geometric center

• At the bottom edge

• At the top corner

• At the side edge

How is the center of gravity determined for irregular objects?

• Using formulas or experimentally by balancing

• By guessing

• By measuring the height

• By measuring the width

What is one application of the center of gravity in building design?

• Ensures stability against tipping

• Increases the height of the building

• Reduces the cost of materials

• Enhances the color of the building

Why is a low center of gravity important in vehicles?

• It improves stability and reduces the risk of rollover

• It increases speed

• It enhances fuel efficiency

• It makes the vehicle lighter