# How do I put a ton in kN

Since the main method of determining the body weight - weighing in everyday life the concept of body weight and body weight have long been synonymous. Typically, when the body weight is mentioned, it is assumed weight. In physics, force is called the weight of the body on the impact of the suspension or support, which occurs due to the gravitational attraction of the Earth. Body weight can vary quite widely - from weightlessness to huge congestion. The mass of the body - almost constant characteristic of the physical body.

### You will need:

calculator or computer

## Instruction in how to translate ton kN

Step 1:

In order to transfer a lot of the physical body, given in tonnes in the weight (in kilonewtons), multiply the number of tons by the number of 9.8 (the acceleration of gravity). That is, use the following formula: Cr = KKN * g, where: Rm - the number of tons, KKN - number kN, g - acceleration due to gravity (≈9,8m / s²) On the dimension of values g (m / s²), you can not pay attention . For more accurate results, use the "exact value of g: 9,806652.

Step 2:

Example. The tank is 60 tons of water. empty tank weight - 1 ton. Question: What is the weight of the filled tank? Solution: (60 + 1) * 9.8 = 59.78 (kN). Calculations made by the above formula is only valid for "normal conditions, ie, near the Earth's surface away from the geomagnetic anomalies and provided that the buoyant force of the gas (or liquid) can be neglected.

Step 3:

If the body is in liquid, it acts buoyant force equal to the weight of the liquid displaced by the body. Therefore, to transfer tons kN for a body immersed in a liquid, use the following formula: Cr = KKN * g - VZ, where: VZ - the weight of the displaced zhidkosti.Primer body. The water tank is placed a metal workpiece weight 2 tons. The weight of the displaced fluid workpiece was 5 kN. Question: What is the weight of the workpiece in the water? Solution: 2 * 9.8 - 5 = 14.6 (kN).

Step 4:

Since the weight of the displaced fluid depends on the density and volume of the body, you can use the following formula: KKN = Rm * g - On * Pl * g * = g * (Rm - On * RV), where: On - the volume of the body, and RV - density of the liquid, at the same time, the volume of the body to be submitted in cubic meters, and the density of the liquid - in tonnes per cubic meter.

Step 5:

If instead of the volume of known density of the body, then use the following formula: KKN = Rm * g - Rm / Fri * RV * g * = CR * g * (1 - RV / Fr), where: Fr - body weight (in tonnes per cubic meter ).