Question: How Do You Calculate Stretching?

What is SI unit of weight?

The SI unit of mass is the kilogram (kg).

In science and technology, the weight of a body in a particular reference frame is defined as the force that gives the body an acceleration equal to the local acceleration of free fall in that reference frame..

Which way does fabric go?

Fabric grain refers to the direction of the warp and weft threads used in weaving the fabric. Straight grain is in the direction of the warp threads, which run parallel to the selvages, and cross grain runs in the direction of the weft threads, which run perpendicular to the selvage edges.

How do I determine my ideal weight?

To calculate the WtHR, a person should divide their waist size by their height. If the answer is 0.5 or less, the chances are that they have a healthy weight. A woman who is 5 feet and 4 inches tall (163 cm), should have a waist measurement below 32 inches (81 cm).

Is weight a force?

Weight is a force acting on that matter . Mass resists any change in the motion of objects. In physics, the term weight has a specific meaning – which is the force that acts on a mass due to gravity. Weight is measured in newtons.

Is weight a force True or false?

True – The weight of an object is equal to the force of gravity acting upon the object. It is computed by multiplying the object’s mass by the acceleration of gravity (g) at the given location of the object.

What fabric has 4 way stretch?

Jersey knits with Lycra are an example. Four-way (or 4-way) stretch means a fabric stretches and recovers both width and lengthwise. Fabrics using or that are nylon/Lycra are an example of four-way stretch fabric. Fabric that are 4-way stretch provides freedom of movement to its wearer.

What is my ideal weight in kg?

Based on the BMI range, it is possible to find out a healthy weight for any given height….B. J. Devine Formula (1974)Male:50.0 kg + 2.3 kg per inch over 5 feetFemale:45.5 kg + 2.3 kg per inch over 5 feet

What is the maximum distance that the spring can be stretched from equilibrium?

At the equilibrium, the spring is not stretched any distance away from the equilibrium, i.e. x=0 and thus the mass moves with maximum velocity (as the total energy = kinetic energy + elastic potential energy, and this is conserved). Therefore, at equilibrium, total energy = elastic potential energy.

How can I calculate weight?

SummaryWeight is a measure of the force of gravity pulling down on an object. It depends on the object’s mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth.The formula for calculating weight is F = m × 9.8 m/s2, where F is the object’s weight in Newtons (N) and m is the object’s mass in kilograms.

How can you tell if a fabric is 4 way stretch?

2-way stretch fabrics stretch in one direction, usually from selvedge to selvedge (but can be in other directions depending on the knit). 4-way stretch fabrics, such as spandex, stretches in both directions, crosswise and lengthwise.

What is a healthy weight?

If your BMI is less than 18.5, it falls within the underweight range. If your BMI is 18.5 to 24.9, it falls within the normal or Healthy Weight range. If your BMI is 25.0 to 29.9, it falls within the overweight range. If your BMI is 30.0 or higher, it falls within the obese range.

How do you calculate stretch force?

F = -kx. The proportional constant k is called the spring constant. It is a measure of the spring’s stiffness. When a spring is stretched or compressed, so that its length changes by an amount x from its equilibrium length, then it exerts a force F = -kx in a direction towards its equilibrium position.

How do you test fabric for stretching?

To To determine the stretch percent of your fabric, grab a 5” section of your fabric and lay it next to a ruler. (If using metric, grab 12cm.) Hold the left side at the zero mark of your ruler and the right end at the 5” or 12cm mark. Stretch the fabric across the ruler until it resists being stretched anymore.

How is Hooke’s Law calculated?

How to use the Hooke’s law calculatorChoose a value of spring constant – for example, 80 N/m .Determine the displacement of the spring – let’s say, 0.15 m .Substitute them into the formula: F = -kΔx = -80 * 0.15 = 12 N .Check the units!More items…•

Is weight a force or mass?

In common usage, the mass of an object is often referred to as its weight, though these are in fact different concepts and quantities. In scientific contexts, mass is the amount of “matter” in an object (though “matter” may be difficult to define), whereas weight is the force exerted on an object by gravity.