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Find the acceleration due to gravity of a 145 kg rock in free-fall at an altitude above the Earth's surface equal to two times the radius of the Earth.

Find the force of gravity acting on the rock.

Answer :

The acceleration due to gravity of an object can be calculated using the formula:

g = G * (M / R^2)

Where g is the acceleration due to gravity, G is the universal gravitational constant (6.674 * 10^-11 N * m^2 / kg^2), M is the mass of the Earth, and R is the distance from the center of the Earth to the object. In this case, the distance is twice the radius of the Earth, which means R = 2 * r, where r is the radius of the Earth. The force of gravity acting on an object is given by:

F = m * g

Where F is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity. Plugging in the values for mass and distance, you can calculate the acceleration and force of gravity acting on the rock.

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