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Chapter 6 | Gravitation and Uniform Circular Motion 263
a. The acceleration due to gravity
b. A gravitational constant that is the same everywhere in
the universe
c. A gravitational constant that is inversely proportional to
the radius
d. The factor by which you multiply the inertial mass to
obtain the gravitational mass
4. Saturn's moon Titan has a radius of 2.58 × 106 m and a measured gravitational field of 1.35 m/s2. What is its mass?
5. A recently discovered planet has a mass twice as great as Earth's and a radius twice as large as Earth's. What will be the approximate size of its gravitational field?
a. 19 m/s2
b. 4.9 m/s2
c. 2.5 m/s2
d. 9.8 m/s2
6. 4. Earth is 1.5 × 1011 m from the Sun. Mercury is 5.7 ×
1010 m from the Sun. How does the gravitational field of the Sun on Mercury (gSM) compare to the gravitational field of the Sun on Earth (gSE)?
