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- 1. Multiple Choice
Newton determined that the pull of Earth’s gravity caused both apples and
the moon to fall toward Earth.
the moon to move away from Earth.
the sun to move away from Earth.
stars to fall toward Earth.
- 2. Multiple Choice
The moon falls toward Earth in the sense that it falls
with an acceleration of 10 m/s2, as apples fall on Earth.
with an acceleration greater than 10 m/s2.
beneath the straight-line path it would take without gravity.
above the straight-line path it would take without gravity.
- 3. Multiple Choice
Planets remain in orbit while falling around the sun due to their
tangential velocities.
zero tangential velocities.
accelerations of about 10 m/s2.
centrifugal forces that keep them up.
- 4. Multiple Choice
Newton did not discover gravity, for early humans discovered it whenever they fell. What Newton did discover is that gravity
tells us about why the universe expands.
tells us how to discover new planets.
accounts for the existence of black holes.
extends throughout the universe.
- 5. Multiple Choice
Consider a space probe three times as far from Earth’s center. Compared at Earth’s surface, its gravitational attraction to Earth at this distance is about
one third as much
one half as much
one ninth as much
zero
- 6. Multiple Choice
Compared to the gravitational field of Earth at its surface, Earth’s gravitational field at a distance three times as far from Earth’s center is about
one third as much
one half as much
one ninth as much
.zero
- 7. Multiple Choice
Compared to the gravitational field of Earth at its surface, Earth’s gravitational field at Earth’s center is
zero
.half as much
twice as much
.three times as much
- 8. Multiple Choice
When an astronaut in orbit is weightless, he or she is
beyond the pull of Earth’s gravity
still in the pull of Earth’s gravity
in the pull of interstellar gravity
.beyond the pull of the sun’s gravity
- 9. Multiple Choice
The highest ocean tides occur when the Earth and moon are
lined up with the sun
at right angles to the sun
at any angle to the sun
lined up during spring
- 10. Multiple Choice
A black hole is
simply a collapsed star
a two-dimensional surface in space
barely visible with high-powered telescopes
a new form of gravity
- 11. Multiple Choice
Newton’s law of universal gravitation had a great impact on society as many scientists, artists, writers, and philosophers hoped that
more complex and universal laws would explain other phenomena of the world
greater observations would require fewer experimentations
no further explanation of other phenomena of the world would be required
studying other phenomena of the world would lead to just as simple and universal laws
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