The 55-kg crate shown in the figure rests on a horizontal surface for which the coefficient of kinetic friction is μk= 0.55−0.09t where t is the time in seconds. If the crate is subjected to a constant 500-N towing force as shown, determine the velocity in m/s and the acceleration in m/s2 of the crate in 3s starting from rest. Hint: integrate. STRICTLY SHOW COMPLETE FBD AND SOLUTION MUST BE HANDW

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Material Properties

Construction in civil engineering demands high strength, durability, and longevity. These targets can be achieved by better design and analysis, along with the correct choice of materials. Different materials have different properties and hence, they respond and performs differently under the various condition of external loadings. It is therefore a critical task of an engineer to select the right material based on the property that the material is supposed to function in real-time. When speaking about the property, there are different categories of material properties like chemical property, physical property, mechanical property, electrical property, magnetic property, thermal property, etc. These material properties form the basis of material selection in various applications.