PROPERTIES OF BULK MATTER

HOOKE’S LAW OF ELASTICITY

A force needed to extend or compress a spring by some distance is proportional to the distance moved by the spring.Hooke’s law works well only when the object is in the elastic region.

HOOKE’S LAW OF ELASTICITY – EXAMPLES

Hooke’s law is a central standard behind the formation of mechanical clock, spring of retractable pen, moving loop galvanometer, making of equilibrium wheel of a spring, compact watch, manometer, spring-stacked air rifle, spring scale, and washroom scale and so forth.

FORMULA

Extension produced on the spring is subjected to the application of force. The formula is applicable only when the object is in the elastic region.

Further, the formula can be expressed as

The significance of the negative sign is that the direction of the restoring force is always opposite to the direction of the displacement.

RESTORING FORCE

Spring force is re-establishing force and the activity of the force is to return the spring to its harmony(equilibrium) position. This reestablishing force is equivalent and inverse to the heading of the applied force.

SPRING

Springs are flexible articles that store mechanical energy,are utilized in watches, compressors, pendulum timekeepers, windup toys, etc. An ideal spring is straight however thought to be massless and frictionless.

SPRING CONSTANT

Spring constant is a number that gives a thought regarding the stiffness, aspect, state of the spring, and how much power is expected to pack or broaden a spring by a given distance inside as far as possible.

Spring constant is the gradient of the straight-line portion of the graph force in newton versus extension in meter.

SPRING CONSTANT-UNIT

SPRING CONSTANT- DIMENSIONAL FORMULA

EXPERIMENTAL METHOD- HOOKE’S LAW OF ELASTICITY

HOOKE’S LAW OF ELASTICITY- TABULAR COLUMN

HOOKE’S LAW OF ELASTICITY-FORCE VERSUS EXTENSION GRAPH

• The test technique for confirmation of Hooke’s law of versatility in the lab is displayed in the graph.
• augmentation information of the given spring for the expansion of different masses of realized weight are noted and arranged
• The connection between normal change long and force creates a straight line going through the beginning and which shows the proportionality among force and augmentation.

Hooke’s law of elasticity – Numerical

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NUMERICAL-2

NUMERICAL-3

Numerical-4

Numerical-5

Numerical -6

HOOKE’S LAW OF ELASTICITY- APPLICATIONS

• Structural designing : Working out the strength and deformability of constructions and structures by choosing materials like, the underlying models of section bars and supports require information on the strength of the materials utilized.
• Channeling designing:For uncovering how much line weight, the spring will convey while permitting wanted warm development.
• Spring manufacturing unit: Hooke’s law portrays versatility, torsion, and the power of springs which are critical to concentrate on the flexible properties of materials, the conduct of spring, design, and the utilization of springs for blowers.

• MEDICAL INDUSTRY : Hooke’s law of flexibility is utilized in clinical supplies and life-saving specialized techniques in which spring system is utilized.

• Counterfeit pacemakers : This gadget sends electrical motivations to the heart.
• Stents :To treat blockages of restricted veins.
• Biopsy forceps: To take a piece of extra growth for examination.

HOOKE’S LAW OF ELASTICITY – RESTRICTIONS

• Hooke’s law gives great outcomes when the disfigurements are little.
• Hooke’s law will forever be surmised rather than exact.
• This law is viewed as substantial for most materials that are in the flexible zone (otherwise goes through long-lasting deformity or change of state), and in certain materials the direct connection is viewed as invalid.