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70 kg equals approximately 686.7 newtons.
This conversion is based on multiplying the mass in kilograms by the acceleration due to gravity, which is roughly 9.81 meters per second squared. So, 70 kg multiplied by 9.81 m/s² gives the force in newtons, indicating the weight of the object under Earth’s gravity.
Table of Contents
Conversion to Newtons
Result in newtons:
Conversion Formula
The formula to convert weight in kilograms to newtons is: Force (N) = mass (kg) * acceleration due to gravity (m/s²). Since gravity on Earth averages around 9.81 m/s², multiplying the mass in kg by 9.81 yields the weight in newtons. For example, 70 kg times 9.81 equals 686.7 N. This works because weight is a force caused by gravity acting on a mass, following Newton’s second law of motion.
Conversion Example
- Convert 50 kg to newtons:
- Multiply 50 kg by 9.81 m/s²
- 50 * 9.81 = 490.5 N
- The weight of 50 kg object is 490.5 newtons.
- Convert 80 kg to newtons:
- 80 * 9.81 = 784.8 N
- The weight of 80 kg object is 784.8 newtons.
- Convert 100 kg to newtons:
- 100 * 9.81 = 981 N
- The weight of 100 kg object is 981 newtons.
- Convert 60 kg to newtons:
- 60 * 9.81 = 588.6 N
- The weight of 60 kg object is 588.6 newtons.
- Convert 90 kg to newtons:
- 90 * 9.81 = 882.9 N
- The weight of 90 kg object is 882.9 newtons.
Conversion Chart
| Kilograms (kg) | Newtons (N) |
|---|---|
| 45.0 | 441.45 |
| 50.0 | 490.50 |
| 55.0 | 539.55 |
| 60.0 | 588.60 |
| 65.0 | 637.65 |
| 70.0 | 686.70 |
| 75.0 | 735.75 |
| 80.0 | 784.80 |
| 85.0 | 833.85 |
| 90.0 | 882.90 |
| 95.0 | 931.95 |
Use this chart to quickly find the weight in newtons for a given mass in kilograms. Simply locate the kg value on the left column and read across to see the equivalent in newtons.
Related Conversion Questions
- How much is 70 kg in pounds and newtons combined?
- If I have 70 kg, what is its weight on the Moon in newtons?
- What is the force in newtons for a 70 kg object falling from a height?
- How do I convert 70 kg to pounds and then to newtons?
- What is the weight of a 70 kg object in different planetary gravities in newtons?
- Can I convert 70 kg to newtons without using a calculator?
- What formula do I use to change 70 kg into newtons in physics problems?
Conversion Definitions
Kg, or kilogram, is a unit of mass measuring the amount of matter in an object, standardized in the metric system, with one kilogram being about 2.2 pounds. Newtons, symbolized as N, are units of force representing the push or pull on an object, calculated as mass times acceleration.
Conversion FAQs
Why do I need to multiply by 9.81 to convert kg to newtons?
This is because 9.81 m/s² is the average acceleration due to gravity on Earth. Since weight is a force, multiplying mass by gravity’s acceleration gives the force exerted on the object, which is measured in newtons, aligning with Newton’s second law.
Can I use a different gravity value for other planets?
Yes, for other celestial bodies, you must replace 9.81 m/s² with the specific gravity of that planet or moon. For example, gravity on the Moon is about 1.62 m/s², so weight calculations for objects there would use that value instead.
Is the conversion same for objects in space?
No, in space, where gravity is negligible, the force in newtons on a mass in orbit is close to zero. The conversion applies only within gravitational fields like Earth’s surface, where gravity acts to produce weight.
What are the units involved in converting kg to newtons?
The units involved are kilograms (kg) for mass, meters per second squared (m/s²) for acceleration due to gravity, and newtons (N) for force. The conversion involves multiplying the mass by the gravity acceleration to get force in newtons.
