NEET Physics Newtons Universal Law of Gravitation MCQs Set 01

Question. The value of G varies with
(a) None of these
(b) radius of the planet
(c) depth below the ground
(d) height above the earth's surface

Answer: A

Question. Force of gravitational attraction is least
(a) at the equator
(b) at the poles
(c) at a point in between equator and any pole
(d) None of these

Answer: A

Question. Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be
(a) F
(b) None of these
(c) 3F
(d) 2F

Answer: A

Question.  Consider the following statements and select the correct statement(s).
I. Gravitational force may be attractive or repulsive
II. Gravitational force between two particles is independent of presence of other particles
III. Gravitational force is a short-range force
(a) II only
(b) II and III
(c) I, II and III
(d) I only

Answer: A

Question.  Two bodies of masses 4 kg and 9 kg are separated by a distance of 60 cm. A 1 kg mass is placed in between these two masses. If the net force on 1 kg is zero, then its distance from 4 kg mass is
(a) 24 cm
(b) 28 cm
(c) 30 cm
(d) 26 cm

Answer: A

Question. A body weighs 72 N on the surface of the earth. What is the gravitational force on it due to earth at a height equal to half the radius of the earth from the surface?
(a) 32 N
(b) 28 N
(c) 16 N
(d) 72 N

Answer: A

Question.  If masses of two point objects is doubled and distance between them is tripled, then gravitational force of attraction between them will nearly
(a) increase by 225%
(b) decrease by 56%
(c) decrease by 44%
(d) increase by 125%

Answer: A

Question.  If three equal masses m are placed at the three vertices of an equilateral triangle of side 1/m then what force acts on a particle of mass 2m placed at the centroid?
(a) Zero
(b) –Gm²
(c) 2Gm²
(d) Gm²

Answer: A

Question.  Two identical spheres of gold are in contact with each other. The gravitational attraction between them is
(a) directly proportional to the fourth power of the radius
(b) inversely proportional to the square of the radius
(c) directly proportional to the cube of the radius
(d) directly proportional to the square of the radius

Answer: A

Question.  Force of gravitational attraction is least
(a) None of these
(b) at the poles
(c) at a point in between equator and any pole
(d) Both

Answer: A

Question. Two bodies of masses 4 kg and 9 kg are separated by a distance of 60 cm. A 1 kg mass is placed in between these two masses. If the net force on 1 kg is zero, then its distance from 4 kg mass is
(a) None of these
(b) 28 cm
(c) 30 cm
(d) 26 cm

Answer: A