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JEE 2020: Physics Gravitation Quiz -2 (21.06.2019)

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Question 1

The velocity of a satellite moving in an orbit about earth at a distance equal to radius R of each will be

Question 2

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

Question 3

The change in the value of acceleration of earth towards sun when the moon comes from the position of solar eclipse to the position on the other side of earth in line with sun is :

(mass of the moon  radius of the moon’s orbit

Question 4

Assuming the earth to be a sphere of uniform density, the acceleration due to gravity inside the earth at a distance of r from the centre is proportional to

Question 5

A point particle is held on the axis of a ring of mass m and radius r at a distance r from its centre C. When released, it reaches C under the gravitational attraction of the ring. Its speed at C will be

Question 6

The gravitational field, due to the left over part of a uniform sphere (from which a part as. Shown has been removed out) at a very far off point P located as shown would be (nearly) :

Question 7

A straight rod of length L extends from x = a to x = L + a. The gravitational force it exerts on a point mass 'm' at x = 0, if the mass per unit length of the rod is A + Bx2, is given by:

Question 8

If the distance between the earth and the sun is half its present values, the number of days in a year would have been

Question 9

A satellite moving with velocity v in a force free space collects stationary interplanetary dust at a rate of  where M is the mass (of satellite +dust) at that instant. The instantaneous acceleration of the satellite is

Question 10

Suppose that the angular velocity of rotation of earth is increased. Then, as a consequence:
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Jul 21JEE & BITSAT