Gravitation
Physics ⇒ Mechanics
Gravitation starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Gravitation.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
Define gravitational potential at a point.
Describe how the value of 'g' changes with altitude above the Earth's surface.
Explain why astronauts feel weightless in a spacecraft orbiting the Earth.
Explain why the value of 'g' is less at the equator than at the poles.
A body weighs 100 N on the surface of the Earth. What would be its weight at a height equal to the radius of the Earth above the surface?
A planet has twice the mass of Earth but the same radius. What is the acceleration due to gravity on its surface compared to Earth?
A satellite is orbiting the Earth at a height where the acceleration due to gravity is 4.9 m/s2. What is the ratio of this height to the radius of the Earth?
Calculate the escape velocity from the surface of a planet of mass 6 × 1024 kg and radius 6.4 × 106 m. (G = 6.67 × 10-11 N m2 kg-2)
If the distance between two objects is tripled, the gravitational force between them becomes: (1) 1/3 as much (2) 1/6 as much (3) 1/9 as much (4) 1/27 as much
The value of the universal gravitational constant (G) is approximately: (1) 6.67 × 10-11 N m2 kg-2 (2) 9.8 m s-2 (3) 3.00 × 108 m s-1 (4) 1.60 × 10-19 C
Which of the following is NOT a consequence of the law of gravitation? (1) Tides in the oceans (2) Falling of an apple (3) Formation of seasons (4) Existence of atmosphere
Which of the following quantities is a vector? (1) Gravitational force (2) Gravitational potential (3) Gravitational potential energy (4) Gravitational constant
Fill in the blank: The acceleration due to gravity on the surface of the Earth is approximately ______ m/s2.
Fill in the blank: The force that keeps planets in orbit around the Sun is called ______ force.
Fill in the blank: The gravitational potential energy of a mass m at a distance r from the center of the Earth (mass M) is ______.
Fill in the blank: The SI unit of gravitational potential is ______.
True or False: The gravitational force between two objects depends only on their masses and the distance between them.
True or False: The gravitational force is the weakest of the four fundamental forces in nature.
True or False: The gravitational potential energy of a system of two masses is always positive.
True or False: The value of G changes from place to place on Earth.
