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Physics Review Question Unit: Mechanics Year: 1991 Question#: 3 Question: Compared to the mass of an object at the surface of the Earth, the mass of the object a distance of two Earth radii from the center of the Earth is (1 ) the same (2 ) twice as great (3 ) one - half as great (4 ) one - fourth What is this question really asking? Explanation by: Alon B [ Return to question menu ] Answer 1 the same CORRECT This answer is correct because the mass of anything will never change no matter how many radiis it moves from the earth. Mass is not dependant on height. return to top Answer 2 twice as great INCORRECT This answer is incorrect because the mass is unaffected by the change in distance. return to top Answer 3 one - half as great INCORRECT This answer is incorrect because the mass is unaffected by the change in distance. return to top Answer 4 one - fourth as great INCORRECT This answer is incorrect because the mass is unaffected by the change in distance. return to top What's this question really asking? This question is trying to see if you know the difference between weight and mass. The mass of a body is the same on the earth and on the moon, but its weight on the moon would be less than on the earth. return to top |
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