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Furthermore, even on the Earth, this value varies with latitude and altitude (to be discussed in later chapters). The acceleration due to gravity is greater at the poles than at the equator and greater at sea level than atop Mount Everest. There are also local variations that depend upon geology. The value of 9.8 m/s is thus merely a convenient average over the entire surface of the This value is accurate to two significant digits up to the altitude at which commercial jets fly (18 km, 29,000&nbsp

4. What height will a dart achieve 7 seconds after being blown straight up at 50 m/s?

The has lots of useful information, for example the following approximation formula for different heights: $$ g_h=g_0left(fracright)^2 $$ Where $g_h$, is the gravity measure at height $h$ above sea level $r_e$, is the Earth&aposs mean radius and $g_0$, is the standard gravity.In metrology laboratories, the exact value for g is displayed for that exact location.

Once again, This consideration is valid only for constant system. Plus, for relativistic systems, the formula isn&apost valid with constant space & time scale.