Assume that the earth is a uniform density spherical mass. (This assumption is n

Question

Assume that the earth is a uniform density spherical mass. (This assumption is not correct but we will use it for simplicity in working the problem.) The deepest hole drilled into the earth's surface went to a depth of 40,230 ft (Wikipedia.org). Imagine that this hole was straight toward the center of the earth and that a small 50 kg spherical mass was dropped into the hole and ended up at the very bottom of it. What would be the weight of the spherical mass at that location? Round your answer to the nearest tenth decimal place and give your answer in the form "a.bc x 10^(y)" N.

Explanation / Answer

It will be mg*r/R where r is distance of mass from centre of earth and R is radius of earth. ans:49.9kg

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