Imagine That You Could Magically Move the Moon Closer to Earth

question 64

Multiple Choice

Imagine that you could magically move the moon closer to Earth, so that the distance from Earth to moon is cut in half. This would cause the force that Earth exerts on the moon to be

• A) increased to four times its original value.
• B) doubled.
• C) reduced to 1/4 of its original value.
• D) halved.
• E) Nonsense-- Earth exerts no force on the moon.

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Least Squares Estimate

A statistical technique that determines the line of best fit for a model by minimizing the sum of the squares of the vertical deviations from each data point to the line.

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