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17 Cards in this Set
- Front
- Back
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Newton’s most celebrated synthesis is of
A. earthly and heavenly laws. B. weight on Earth and weightlessness in outer space. C. masses and distances. D. the paths of tossed rocks and the paths of satellites.. |
A. earthly and heavenly laws.
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The force of gravity between two planets depends on their
A. masses and distance apart. B. planetary atmospheres. C. rotational motions. D. all of the above. |
A. Masses and distance apart
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If the masses of two planets are each somehow doubled,
the force of gravity between them A. doubles. B. quadruples. C. reduces by half. D. reduces by one quarter. |
B. Quadruples
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If the mass of one planet is somehow doubled, the force of
gravity between it and a neighboring planet A. doubles. B. quadruples C. reduces by half. D. reduces by one quarter. |
A. Doubles
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The universal gravitational constant, G, which links force to
mass and distance, is similar to the familiar constant A. π. B. g. C. acceleration due to gravity. D. speed of uniform motion. |
A. π
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When an elevator accelerates upward, your weight reading
on a scale is A. greater. B. less. C. zero. D. the normal weight. |
A. greater.
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When an elevator accelerates downward, your weight
reading is A. greater. B. less. C. zero. D. the normal weight. |
B. less.
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When the elevator cable breaks, the elevator falls freely so
your weight reading is A. greater. B. less. C. zero. D. the normal weight. |
C. zero.
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If you weigh yourself in an elevator, you’ll weigh more when
the elevator A. moves upward. B. moves downward. C. accelerates upward. D. all of the above. |
C. accelerates upward.
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Comparing the CG of women versus men, most women’s
CG is A. slightly higher than in men. B. slightly lower than in men. C. equal to that of men. D. can’t be determined. |
B. slightly lower than in men.
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The velocity of a typical projectile can be represented by
horizontal and vertical components. Assuming negligible air resistance, the horizontal component along the path of the projectile A. increases. B. decreases. C. remains the same. D. not enough information. |
C. remains the same.
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When no air resistance acts on a fast-moving baseball, its
acceleration is A. downward, g. B. due to a combination of constant horizontal motion and accelerated downward motion. C. opposite to the force of gravity. D. centripetal. |
A. downward, g.
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A ball tossed at an angle of 30° with the horizontal will go
as far downrange as one tossed at the same speed at an angle of A. 45°. B. 60°. C. 75°. D. none of the above. |
B. 60
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When you toss a projectile sideways, it curves as it falls. It
will be an Earth satellite if the curve it makes A. matches the curved surface of Planet Earth. B. results in a straight line. C. spirals out indefinitely. D. none of the above. |
A. matches the curved surface of Planet Earth.
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When a satellite travels at constant speed, the shape of its
path is A. a circle. B. an ellipse. C. an oval that is almost elliptical. D. a circle with a square corner, as seen throughout your book. |
A. a circle.
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The speed of a satellite in an elliptical orbit
A. varies. B. remains constant. C. acts at right angles to its motion. D. all of the above. |
A. varies.
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When a projectile achieves escape speed from Earth, it
A. forever leaves Earth’s gravitational field. B. outruns the influence of Earth’s gravity but is never beyond it. C. comes to an eventual stop, eventually returning to Earth at some future time. D. all of the above. |
B. outruns the influence of Earth’s gravity but is never beyond it
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