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qUESTIONS

If the mass of the Sun were ten times smaller and the universal gravitational constant were ten time larger in magnitude, which of the following is not correct

Which one of the following plots represents the variation of gravitational field on a particle with distance r due to a thin spherical shell of radius R (r is measured from the centre of the spherical shell)

For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

The condition for a uniform spherical mass m of radius r to be a black hole is [G= gravitational constant and g= acceleration due to gravity]

A body weighs 200N on the surface of the earth. How much will it weigh halfway down to the centre of the earth

The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth is

Kepler’s third law states that square of period of revolution (T) of a planet around the sun, is proportional to third power of average distance r between sun and planet i.e., T^2 = Kr^3 Here K is constant. If the masses of sun and planet are M and m respectively then as per Newton’s law of gravitation force of attraction between them is F =GMm/r^2 here G is gravitational constant. The relation between G and K is described as

The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C and D and t2 is the time to move from A to B then

A planet moving along an elliptical orbit is closest to the sun at a distance r1 and farthest away at a distance of r2. If v1 and v2 are the linear velocities at these points respectively. Then the ratio v1/v2

Potential energy of a satellite having mass ‘m’ and rotating at a height of 6.4×10^6 m from the earth surface is

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