Why don't we fly when we jump in the air? Why do we fall back to earth again? This is all due to the force of gravity. It is an attractive force that is not visible, but every object that has a mass also has its gravity. Gravitational Force is an attraction force present between any two substances, objects or particles. The force of gravity is not only the attraction force between the Earth and objects, but it exists between every substance or object in the universe. The force of gravity is the reason that our earth revolves around the sun and the moon revolves around the earth. The force of gravity does not only pull objects of mass towards itself but also attracts light towards itself. We can not see this secret with our eyes but scientists can see it through machines. Due to the force of gravity, there is air on the earth and life is going on. If the gravitational force of the earth gets exhausted, then the air will also disappear in space and none of us will survive. Everything will evaporate. So, take this quiz and know more about Gravitational force.
1. Which of the following has the strongest gravitational pull?
A. The Earth
B. The Mars
C. The Sun
D. None of these
2. When will gravity be the strongest?
A. The further away you are from an object
B. The closer you are to an object
C. The faster your relative speed is to an object
D. None of these
3. Which scientist is credited with first describing the mathematics of gravity?
A. Thomas Edison
B. Alexander Graham Bell
C. Bill Gates
D. Isaac Newton
4. What do we call the force of gravity on an object?
A. Weight
B. Mass
C. Speed
D. None of the above
5. Which natural phenomena occur on Earth due to the gravity of the Moon?
A. Hurricanes
B. Volcanic eruptions
C. Ocean tides
D. Thunder storms
6. Where would you weigh the most?
A. Mars
B. The Sun
C. Pluto
D. Earth
7. Where is the maximum gravitational force on the earth?
A. Equator
B. Tropic of Cancer
C. Tropic of Capricorn
D. Poles
8. Where is the minimum gravitational force on the earth?
A. Equator
B. Tropic of Cancer
C. Tropic of Capricorn
D. All of above
9. At which distance from earth is zero gravity?
A. 3,300 km
B. 3,200 km
C. 3,100 km
D. 3,000 km
10. What is the value of gravitational constant {G}?
A. 6.674×10−8 cm3⋅g−1⋅s−2
B. 6.674×10−9 cm3⋅g−1⋅s−2.
C. 6.674×10−11 cm3⋅g−1⋅s−2.
D. 6.674×10−6 cm3⋅g−1⋅s−2.
11. When was Isaac Newton published a comprehensive theory of gravity?
A. In 1677
B. In 1667
C. In 1697
D. In 1687
12. Which is the formula of gravitational acceleration?
A. g = M*G/R^2
B. g = G*R/M^2
C. g = G*M/R^2
D. g = R*M/R^2
13. The first artificial Satellite of the world is ......
A. Explorer 1
B. Sputnik 1
C. Aryabhata
D. None of these
14. What is the period of artificial geostationary satellite?
A. 42 hours
B. 36 hours
C. 24 hours
D. 12 hours
15. What natural phenomena occur on Earth due to the gravity of the Moon?
A. Earthquake
B. Ocean tides
C. Both of these
D. None of these
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