You will need
• a calculator or computer
Instruction
1
To translate the mass of a physical body, given in tons to its weight (in kilonewtons), multiply number of tons by the number of 9.8 (acceleration of gravity). That is, use the following calculation:CCS = CT * g, where:Kt – quantity tons
CCS – the amount of kilonewton,
g – acceleration of gravity (≈9.8 m/S2)the unit of g (m/S2) can not pay attention. For more accurate results, use "exact value of g: 9,806652.
2
Example.
The tank is 60 tons of water. The empty weight of the tank is 1 ton.
Question: What is the weight of the filled tank?
The decision: (60+1)*9,8= 59,78 (kilonewton). Calculations made according to the above formula is only true for "normal conditions , i.e., near the earth's surface, away from magnetic anomalies and assuming that the buoyancy force of the gas (or liquid) can be neglected.
3
If the body is liquid, it acts upward buoyant force equal to the weight of the displaced body of liquid. Therefore, to convert tons to kN a body immersed in a fluid, use the following calculation:CCS = CT * g – Vzh where: Vzh – the weight of the displaced body of liquid.Example.
In a tank of water placed metal piece weight of 2 tons. The weight of the displaced billet fluid was 5 kilonewton.
Question: What will be the weight of the billet in the water?
Solution: 2*9,8 – 5 = 14,6 (kilonewton).
4
As the weight of the displaced fluid depends on its density and the volume of the body, you can use the following formula:CCS = CT*g – *PL*g* = g*(CT – *RV), where: VL – volume of the body, and Pancreas is the fluid density,
thus, the volume of the body should be presented in cubic meters, and liquid density in tonnes per cubic meter.
5
If the volume is known the density of the body, then use the following formula:CCS = CT*g – CT/PT*RV*g* =Kt*g*(1 – RV/PT),where PT is the density of the body (in tonnes per cubic meter).