A wood is in a shape of rectagnular paralleliped with square as base is used as a buoy floating in salt water. A man weighing 70kg stands still on the top of the buoy and it still floats with a period of verticol bobbing of 0.83s. When the ma moves away from the buoy, the period of bobbing becomes 0.69s. Determine the dimensions in meters of the wood. SGwood=0.60 & SGsaltwater=1.03. Assume that the wood will upright at all times.

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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).