The figure (Eigure 1) shows a model of a crane that may be mounted on a truck A rigid uniform horizontal bar of mass m1 = 85.0 kg and length L = 5.20 m is supported by two vertical massless strings. String A is attached at a distance d = 1.60 m from the left end of the bar and is connected to the top plate. String B is attached to the left end of the bar and is connected to the floor. An object of mass m2 = 2500 kg is supported by the crane at a distance z = 5.00 m from the left end of the bar. Throughout this problem, positive torque is counterclockwise and use 9.80 m/s? for the magnitude of the acceleration due to gravity.

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Mechanical Properties of Solids

There are three types of matter- solid, liquid and gas. Out of them, solids have a rigid shaped and size. The intermolecular forces of attractions in solids are greatest. Mechanical properties are the physical properties of a material which it shows, when it is provided with certain amount of force or load. These properties are to be kept in mind for various purposes. When a force is applied to an object, the object may or may not get deformed depending upon its elastic property. But every time the object develops a restoring force against the force applied. This is commonly known as stress. If the object changes its dimensions due to the force applied it develops strain ( which is the ratio of change in dimension to the original dimension).