Without fracture of the femur, determine the maximum height, in cm, from which a 70-kg woman can jump onto just one of her heels, where bare foot and where keeping her leg straight. Assume that all of her stored gravitational potential energy is transfered to strain potential energy in her femur. Take the following values : her femur length, l = 60cm, her femur area, A = 3.5cm2, Youngs modulus for her bone, Y = 1.2x1010 N/m2, and the rupture stress for her bone is σmax = 7.0 x 107 N/m2

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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).