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8. Security - check for the yellow padlock on the Standard Gravity site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Standard Gravity, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Standard Gravity, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

Standard gravity, usually denoted by g0 or gn, is the nominal acceleration due to Earth's gravity at the Earth's surface at sea level. By definition it is equal to exactly 9.80665  m·s−2 (approx. 32.174 ft·s−2).The notation m·s−2 means meters per second per second, and the notation ft·s−2 means feet per second per second. This value was established by the 3rd General Conference on Weights and Measures (1901, CR 70).

The symbol g is sometimes also used for standard gravity, but g strictly means the local acceleration due to gravity, which varies depending on one's position on Earth. The symbol g should not be confused with G, the gravitational constant, or g, the abbreviation for gram (which is not italicized). The g (pronounced "gee") is also used as a unit of acceleration, with the value defined as above; see g-force.

The value of g0 defined above is an arbitrary midrange value on Earth, approximately equal to the acceleration of a body in free fall (in the absence of air resistance) at sea level at a geodetic latitude of about 45.5°. It is larger in magnitude than the average sea level acceleration on Earth, which is about 9.797 645 m·s−2. Although the actual strength of gravity on Earth varies according to location (see Earth's gravity), for weights and measures and many calculation purposes the standard gravity figure is used.

The SI units of acceleration due to gravity (or, indeed, any acceleration), namely meters per square second, are interchangeable with newtons per kilogram. The numerical value, 9.80665, stays the same. These alternative units may be more intuitive when considering problems involving pressure due to gravity, or weight. For example, under standard gravity a mass of 1 kilogram exerts a weight force of 9.80665 newtons.

References

See also

• Earth's gravity
• g-force, a measure of apparent acceleration
• Gravitational constant, the gravitational constant in Newton's law of gravity
• Gravitational acceleration

External Links

• http://physics.nist.gov/Document/sp330.pdf (pg.29 in document or pg. 39 of pdf)
• http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf (pg.143 in document or pg. 51 of pdf)
Standard gravity, usually denoted by g0 or gn, is the nominal acceleration due to Earth's gravity at the Earth's surface at sea level. By definition it is equal to exactly 9.80665  m·s−2 (approx. 32.174 ft·s−2).The notation m·s−2 means meters per second per second, and the notation ft·s−2 means feet per second per second. This value was established by the 3rd General Conference on Weights and Measures (1901, CR 70).

The symbol g is sometimes also used for standard gravity, but g strictly means the local acceleration due to gravity, which varies depending on one's position on Earth. The symbol g should not be confused with G, the gravitational constant, or g, the abbreviation for gram (which is not italicized). The g (pronounced "gee") is also used as a unit of acceleration, with the value defined as above; see g-force.

The value of g0 defined above is an arbitrary midrange value on Earth, approximately equal to the acceleration of a body in free fall (in the absence of air resistance) at sea level at a geodetic latitude of about 45.5°. It is larger in magnitude than the average sea level acceleration on Earth, which is about 9.797 645 m·s−2. Although the actual strength of gravity on Earth varies according to location (see Earth's gravity), for weights and measures and many calculation purposes the standard gravity figure is used.

The SI units of acceleration due to gravity (or, indeed, any acceleration), namely meters per square second, are interchangeable with newtons per kilogram. The numerical value, 9.80665, stays the same. These alternative units may be more intuitive when considering problems involving pressure due to gravity, or weight. For example, under standard gravity a mass of 1 kilogram exerts a weight force of 9.80665 newtons.

References

See also
• Earth's gravity
• g-force, a measure of apparent acceleration
• Gravitational constant, the gravitational constant in Newton's law of gravity
• Gravitational acceleration


External Links
• http://physics.nist.gov/Document/sp330.pdf (pg.29 in document or pg. 39 of pdf)
• http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf (pg.143 in document or pg. 51 of pdf)




Standard gravity - Wikipedia, the free encyclopedia
Standard gravity, usually denoted by g 0 or g n, is the nominal acceleration due to gravity at the Earth's surface at sea level. By definition it is equal to exactly 9.80665 m/s 2 ...

Gravitation - Wikipedia, the free encyclopedia
... third law of planetary motion; Newton's laws of motion; n-body problem; The Pioneer spacecraft anomaly; Scalar Gravity; Speed of gravity; Standard gravitational parameter; Standard gravity; Weight ...

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standard gravity. Acceleration due to gravity, generally taken as 9.81274 m/32.38204 ft per second per second. See also g scale.?

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1. the phenomenon by which two bodies having mass are attracted to each other.

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BBC - Education Scotland - Standard Grade Bitesize Revision - Physics, Forces and Motion, Gravity and Movement, Effects of air resistance. Standard Grade Bitesize is the easy to ...

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1. Physics. a. The natural force of attraction exerted by a celestial body, such as Earth, upon objects at or near its surface, tending to draw them toward the center of the body.

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Science Engineering Encyclopedia ... Standard Acceleration due to Gravity. The acceleration of freefall, the acceleration at which an object would fall under the force of gravity ...

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CODATA Value: standard acceleration of gravity
standard acceleration of gravity : Value: 9.806 65 m s-2: Standard uncertainty (exact) Relative standard uncertainty (exact) Concise form 9.806 65 m s-2