Science structural strength and stability🌱

• Tension is a force that stretches the structures
• Tension will cause an object to increase in length not decrease
• Tension would stretch out ⬅️➡️ not squeezed in ➡️⬅️
• Compression is the force that squashes structures causing it to decrease length
• Shear is the force that pushes in opposite direction, causing the force to move in opposite directions
• Shear pushes, pulls or tears apart structures
• Torsion is the force that twist or rotates structures
• Tension + compression are to internal forces that act together in many structures
• Internal force affects structures from the inside they are divided into four forces tension, shear, compression, torsion
• External force affects structures from the outside and are divided into two groups live loads and dead loads
• Live loads are strong winds (structures can bend with wind) or impact forces (structures are designed to resist many small impacts before collapsing like bookshelf) or objects on or within the structure (structure are designed to carry the extra load like snow on roof)
• dead loads are the weight of the parts that hold the structure together like a structure of a house *not complete question
• Magnitude is meaning size