Gravitation Test

Result

Gravitation Test - 33

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Weekly Quiz Competition

Question 1
4 / -1

Mass M is divided into two parts xM and (1 – x) M. For a given separation, the value of x for which the gravitational force between the two pieces becomes maximum is

A
1

B
2

C
1/2

D
4/5

Solution
Question 2
4 / -1

A

B
Zero

C

D

Solution
Question 3
4 / -1

Two particle of equal mass go round a circle of radius r. Under the action of their mutual gravitational force. The speed of each particle is =..................

A

B

C

D

Solution
Question 4
4 / -1

The distance of the moon and earth is D the mass of earth is 81 times the mass of moon. At what distance from the centre of the earth, the gravitational force will be zero

A
D/2

B
12D/3

C
4D/3

D
9D/10

Solution
Question 5
4 / -1

One can easily “ Weight the earth ” by calculating the mass of earth using the formula (in usual notation)

A

B

C

D

Solution
Question 6
4 / -1

Three equal masses of m kg each are placed the vertices of an equilateral triangle PQR and a mass of 2m kg is placed at the centroid 0 of the triangle which is at a distance of √2 m from each of vertices of triangle. The force in newton. acting on the mass 2m is = ............

A
1

B
2

C
√2

D
Zero

Solution
Question 7
4 / -1

Which of the follwing statement about the gravitational constant is true

A
It is a force

B
It has no unit

C
It has same value in all system of unit

D
It depends on the value of the masses.
Question 8
4 / -1

Two point masses A and B having masses in the ratio 4 : 3 are separated by a distance of lm. When another point mass c of mass M is placed in between A and B the forces A and C is 1/3rd of the force between band C, Then the distance C form A is = ............... m

A
2/3

B
1/3

C
1/4

D
2/7

Solution
Question 9
4 / -1

A
Depends on system of units only.

B
Depends on medium between masses only

C
Depends on both (a) and (b)

D
is independent of both (a) and (b)
Question 10
4 / -1

In a gravitational field, at a point where the gravitational potential is zero

A
The gravitational field is necessarily zero

B
The gravitational field is not necessarily zero

C
Nothing can be said definitely, about the gravitational field

D
None of these

Solution