Gravitation or gravity is the force of attraction between particles separated by a definite distance.It is the universal force of attraction acting between all the bodies in the universe. The concept of gravity is a natural phenomenon between two bodies, where each body exerts force on each other. It controls the movement of bodies in the solar system and also determines its trajectories.
Question 1: The equation of Newton’s law of gravitation is dependent on
a) Mass b) Gravitational constant
c) Distance d) All of the above
Answer: d) All of the above
Question 2: If the radius of earth decreases by 5%, the new value of gravitational constant G would
a) decrease by 0.5 % b) increase by 0.5 %
c) remains constant d) None of the above
Answer: c) remains constant
Explanation: Universal gravitational constant
Question 3: Which of these is the correct expression for the SI unit of gravitational constant G ?
Explanation: Force F = ma
Question 4: Two spherical bodies of radius “r” and density “d” are in contact with each other. The gravitational force between them is proportional to
Explanation: Mass of body = Volume * Density
Question 5: The value of acceleration due to gravity is least on
a) Poles b) Equator
c) Equator and poles d) None of the above
Answer: b) Equator
Explanation: Acceleration due to gravity
Question 6: A body of mass M is split into two masses of (m) and (M - m) What is the relation between two masses so that the force of gravitation is maximum.
a) m = M b) m = M/3
c) m.M = 2 d) m = M/2
Answer: d) m = M/2
Question 7: The value of gravitational constant G on the planet Mars is _________ than on Earth.
a) greater b) smaller
c) same d) none of the above
Answer: c) same
Explanation: Gravitational constant is an universal constant and remains constant everywhere
Question 8: A body weighs 10kg on the surface of the earth. How much it will weigh on the planet, whose mass is 1/7 of and radius half of the earth.
a) 20 kg b) 10 kg
c) 30 kg d) 50 kg
Answer: a) 20 kg
Question 9: The gravitational force between two identical spheres in contact with each other is proportional to
Question 10: Gravitational constant is experimentally determined by
a) Galileo’s experiment b) Pascal’s experiment
c) Newton’s experiment d) Cavendish experiment
Answer: d) Cavendish experiment
Explanation: Gravitational constant G