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Friday, 10 March 2017

Properties of Bulk Matter I


MECHANICS OF SOLID AND FLUID
Deforming force:- A force acting on a body which produces change in its shape of body instead of its state of rest or uniform motion of the body.

Elasticity:- The property of matter by virtue which it regains its original shape and size, when the deforming forces are removed is called elasticity.

Plasticity:- The inability of a body to return to its original shape and size, when the deforming forces are removed is called plasticity.

Hooke’s law:- when a wire is loaded within elastic limit, the extension produced in wire is directly proportional to the load applied.
OR
Within elastic limit stress α strain
Stress :- Restoring force set up per unit area when deforming force acts on the body

Strain:- The ratio of change in dimension to the original dimension is called strain
Hooke’s Law:- Within elastic limit, stress α strain  = Constant (Modulus of Elasticity)

Modulus of elasticity are of 3 types.

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