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qUESTIONS

Weight of 1 kg becomes 1/6 on moon. If radius of moon is 1.768 x 10^6 m, then the mass of moon will be

Assuming that the earth is a sphere of radius RE with uniform density, the distance from its centre at which the acceleration due to gravity is equal to g/3 (g is the acceleration due to gravity on the surface of earth) is

A rocket is fired from inside a deep mine, so as to escape the earth’s gravitational field. The minimum velocity to be imparted to the rocket is

The potential energy of 4 particles each of mass 1 kg placed at the four vertices of a square of side length 1 m is

The escape velocity of a planet having mass 6 times and radius 2 times as that of earth is

A point particle of mass 0.5 kg is moving along the x-axis under a force described by the potential energy V shown below. It is projected from the origin with a speed v. what is the minimum value of v for which the particle will escape infinitely far away from the origin

A spherical planet has a mass Mp and diameter Dp. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to

Out of the following, the only correct statement about satellites is

A planet orbits in an elliptical path of eccentricity e around a massive star considered fixed at one of the foci. The point in space where it is closest to the star is denoted by P and the point where it is farthest is denoted by A. Let Vp and VA be the respective speeds at P and A, Then

A satellite of mass m is orbiting close to the surface of the earth (Radius R = 6400 km) has a kinetic energy K. The corresponding kinetic energy of the satellite to escape from the earth’s gravitational field is

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