1. The earth's gravitational force on an object near its surface is 30 N. What is the magnitude of the earth's attractive force when the mass of the object is increased three times?
a. 10 N
b. 50 N
c. 90 N
d. 270 N
2. An unknown planet has a molar mass of 4.25 x10²⁰ kg and a radius of 3.46 x10⁵ m. What is the acceleration due to gravity?
a. 0.24 m/s squared
b. 2.4 m/s squared
c. 4.25 m/s squared
d. 9.8 m/s squared
3. The sun has a mass of 2 x10³⁰ kg, and is 1.5 x10⁸ km away from the earth, while the mass of the moon 7.35 x10²² kg, and is 3.8 x10⁵ km away from the earth. Which exerts a greater gravitational influence on earth?
a. moon
b. sun
c. both sun and moon
d. neither
4. A 1000kg object is at a distance from another object with a mass of 100 kg. The force of attraction between the two is 2.67 x10⁻¹¹ N. How far are the two objects?
a. 200 m
b. 300 m
c. 500 m
d. 750 m
5. Which of the following is true about the magnitude of gravitational force between the sun and the earth?
a. the magnitude of the sun's attractive force is greater than the earth
b. the magnitude of the sun's attractive force is equal to the earth's attractive force
c. the magnitude of the earth's attractive force is greater than that of the sun
d. the magnitude of the sun's and earth's is maximum
6. Why is the gravitational attraction between us and the earth stronger than between us and the sun?
a. the sun is more massive than earth
b. the earth is more massive than the sun
c. we are closer to the center of the earth
d. the sun is exerting large attractive force on earth
7. How is the acceleration due to gravity of a planet related to its mass and radius?
a. it is directly related to the mass and square of the radius
b. it is inversely related to the mass and square of the radius
c. it is directly related to the mass but inversely related to the square of the radius of the planet
d. it is directly related to the square of both the mass and radius of a planet
p.s. pasagot please, ang sakit na ng utak ko
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Answer:
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