2. At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.835 m/s2 if the acceleration due to gravity at the surface has magnitude 9.80m/s2?
______ m
Can you finish this problem before 12 pm central time cause around that time is when the assignment is due. Thank you for your time, have a great day!
here,
let the distance from the surface of earth is x
as g = go/(1 + h/R)^2
where R is the radius of earth
0.835 = 9.8/(1 + h/6371)^2
solving for h
x = 15422.2 km = 1.54 *10^7 m
the distance from the surface of earth is 1.54 *107 m
SOLUTION :
Let that height be h m from the earth’s surface at which altitude, g’ = 0.835 m/s^2
g at the earth’s surface is = 9.8 m/s^2.
As we go up, value of acceleration due to gravity decreases.
Value of g’ at height h is given by the following formula:
g’ = g (1 - 2h / R)
Where,
g’ = acceleration due to gravity at height h = 0.835 m/s^2 (given in the problem)
g = acceleration due to gravity at earth’s surface = 9.8 m/s^2
h = height at which g’ = 0.835 m/s^2. (To be determined)
R = radius of the earth = 6371 km = 6.371*10^6 m
So, as per above formula :
0.835 = 9.8( 1 - 2 h / (6.371 * 10^6) )
=> h = (1 - 0.835/9.8) * (6.371 * 10^6) / 2
=> h = 2 914 082.40 m = 2914.082 km
=> h = height at which g’ is 0.835 m/s^2 = 2914.082 km approx. (ANSWER).
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