## What is the extension in physics?

We measure the original length of the spring when we start. When it stretches, we measure the extension – that’s how much longer it is than it was when we started. Extension = present length – original length.

What do bridges do in physics?

They do it by carefully balancing two main kinds of forces called compression (a pushing or squeezing force, acting inward) and tension (a pulling or stretching force, acting outward), channeling the load (the total weight of the bridge and the things it carries) onto abutments (the supports at either side) and piers ( …

What is bridge and where it is used in physics?

Bridges are used to measure the values of the electronic components. For example a Wheatstone Bridge is used to measure the unknown resistance of a resistor. However they are also used to measure the unknown inductance, capacitance, admittance, conductance or any of the impedance parameters.

### What is the force extension?

Force-extension or force-elongation graph A force-extension (or force-elongation) graph is used to describe the properties of a material when in tension. It is the result of tensile testing. Extensometer An extensometer is a device that is used to measure changes in the length of an object.

How do I calculate my extension?

Hooke’s Law

1. If you measure how a spring stretches (extends its length) as you apply increasing force and plot extension (e) against force (F);
2. F = ke.
3. F = tension acting on the spring.
4. e is extension = (l-lo); l is the stretched length and lo is original length, and.
5. k is the gradient of the graph above.

What are the units of extension?

Many materials obey this law as long as the load does not exceed the material’s elastic limit. The rate or spring constant, k, relates the force to the extension in SI units: N/m or kg/s2.

## Why do we need bridges?

A bridge helps maintain the natural shape of your face and may help support your lips and cheeks. The loss of a back tooth may cause your mouth to sink and your face to look older. Teeth that have tipped are difficult to clean, making them more likely to decay. As a result, even more teeth may eventually be lost.

Why it is called meter bridge?

Explanation: The reason why this bridge is called as Meter Bridge is because of the fact that it works on the Wheatstone bridge’s principle. So, people also popularly call it as Wheatstone’s meter bridge. Another thing is that the wire length used in this circuit is of 1 meter, so it has got its name as a meter bridge.

What is the formula of meter bridge?

ρ=Lπr2X ; Where L be the length of the wire and r be its radius.

### How do you calculate Young’s modulus extension?

1. Strain. Stress. B.
2. Young’s modulus = stress (force/cross sectional area) strain (extension/ original length)
3. When an elastic object – such as a spring – is stretched, the increased length is called its extension. The. extension of an elastic object is directly proportional to the force applied to it:
4. extension (m) fo.

How much does an extension cost per m2?

They do not include VAT or professional fees. House extension costs: Single storey – A single storey extension in London will usually cost between £2,000 and £3,000 per sqm (£185 and £280 per square foot). £2,000 per sqm would represent cost-effective finishes and products.

What kind of force does a bridge have?

COMPRESSION – A force that acts to push together on an object that compress or shorten it. Typically the top chords of the bridge will be in compression. Different truss designs spread out the force so that various internal parts will be in compression as well.

## How are cables used to create tension on a bridge?

Cables are strung over two towers and then anchored on both ends. The roadway is suspended from the cables by thinner cables or rods. The roadway’s weight and any additional load are transferred to the cables, creating a tension force in the cables. The cables then transfer their force to the towers and anchors.

When do forces and extension of an object occur?

Forces and extension Extension happens when an object increases in length, and compression happens when it decreases in length. The extension of an elastic object, such as a spring, is described by Hooke’s law: force exerted by a spring = extension × spring constant

What is Chapter 3 meter bridge in physics?

Class 12 Physics: Chapter 3 Meter Bridge Meter Bridge is used to find the unknown resistance of a conductor as that of in a wheatstone bridge. It is one of the systems under Current Electricity Mechanism.