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Question (11)

QN0035404

Three identical particles and of mass each are placed in a straight line with . The gravitational force on a fourth particle of the same mass is , when placed at a distance from the particle on the perpendicular bisector of the line . The value of will be approximately :

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

So,

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Question (12)

QN0035405

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
(B)
decrease by
(C)
decrease by
(D)
increase by

Correct Answer: C

Explanation:

change

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Question (13)

QN0035406

A central particle is surrounded by a square array of other particles, separated by either distance or distance along the perimeter of the square. The magnitude of the gravitational force on the central particle due to the other particles is

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

.

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Question (14)

QN0035407

If three equal masses are placed at the three vertices of an equilateral triangle of side then what force acts on a particle of mass placed at the centroid?

(A)
(B)
(C)
Zero
(D)

Correct Answer: C

Explanation:

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Question (15)

QN0035408

Two identical spheres of gold are in contact with each other. The gravitational attraction between them is

(A)
directly proportional to the square of the radius
(B)
directly proportional to the cube of the radius
(C)
directly proportional to the fourth power of the radius
(D)
inversely proportional to the square of the radius

Correct Answer: C

Explanation:

The gravitational force of attraction between two identical spheres of radius is

i.e.,

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Question (16)

QN0035409

Two particles of equal mass ' ' go around a circle of radius under the action of their mutual gravitational attraction. The speed of each particle with respect to their centre of mass is

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

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Question (11)

Three identical particles and of mass each are placed in a straight line with . The gravitational force on a fourth particle of the same mass is , when placed at a distance from the particle on the perpendicular bisector of the line . The value of will be approximately :

Explanation:

Link:

Question (12)

If masses of two point objects is doubled and distance between them is tripled, then gravitational force of attraction between them will nearly

Explanation:

Link:

Question (13)

A central particle is surrounded by a square array of other particles, separated by either distance or distance along the perimeter of the square. The magnitude of the gravitational force on the central particle due to the other particles is

Explanation:

Link:

Question (14)

If three equal masses are placed at the three vertices of an equilateral triangle of side then what force acts on a particle of mass placed at the centroid?

Explanation:

Link:

Question (15)

Two identical spheres of gold are in contact with each other. The gravitational attraction between them is

Explanation:

Link:

Question (16)

Two particles of equal mass ' ' go around a circle of radius under the action of their mutual gravitational attraction. The speed of each particle with respect to their centre of mass is

Explanation:

Link:

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