Q:

What is a force meter?

A:

A force meter is a device comprising a hook and spring that measures force. The standard international unit of force is the newton.

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Force is a push or pull measured in newtons, named after the scientist Isaac Newton. Force can alter the shape of an object. It can also change the direction of motion of an object, or increase or decrease its speed.

It is possible to measure force using a device called a force meter. The front of the force meter features markings that indicate the number of newtons. Running through the center of the device is a measuring section on a spring with a metal hook on the end.

Hanging an object on the hook of a force meter results in the spring stretching due to the pull of the force. If the object exerts a large amount of force, then the spring stretches a long distance. An experimenter can read the measurement of force from the markings on the meter.

There are effectively two types of forces. Contact forces result in a direct physical interaction, such as air resistance, friction or tension. Other forces act at a distance in a non-physical interaction, such as gravity or magnetic forces.

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Related Questions

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Robert Hooke observed that a piece of elastic or a spring stretches when a force pulls it. Hooke’s law explains that the same increase in the length of the spring is observed every time a fixed force is used for pulling the spring. The spring retains its original length by removing the force, and the extension becomes irreversible if it goes beyond the elastic limit of the spring.

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The formula for Hooke's law is given by F = kx, where x is the displacement in the spring in meters, k is the force constant or spring constant and F is the amount of force applied on the spring in Newtons. Hooke's law states that the amount of stress applied on an object to deform it is proportional to the amount of deformation. It can be used to determine the force, displacement and force constant in a stretched spring.

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Viscometers generally work by measuring the force and displacement of a device inside the instrument. They are either placed in a fluid or have fluids injected to perform measurement. When a fluid exerts stress on the instrument's displacement, the fluid's viscosity can be determined.