Volume 1

The mass of the moon is 81/1 of the earth but the gravitational pull is 6/1 of the earth. It is due to the fact that The mass of the moon is 81/1 of the earth but the gravitational pull is 6/1 of the earth. It is due to the fact that September 18, 2020 [...]

The height of a point vertically above the earth’s surface at which the acceleration due to gravity becomes 1% of its value at the surface is (Given, R= radius of earth) R= radius of earth) The height of a point vertically above the earth's surface at which the acceleration due to gravity becomes 1% of [...]

Assertion : On earth’s satellite, we feel weightlessness. Moon is also satellite of earth. But on the surface on moon, we do not feel weightlessness Reason : Gravitational force by earth on us on the surface of moon is zero. But gravitational force by moon on us on its surface is non-zero. Assertion : On [...]

Assertion : Let W1 be the work done in taking away a satellite from the surface of earth to its orbit and then W2 the work done in rotating the satellite in circular orbit there. Then, W1=W2 Reason : W2=GMm/2R Assertion : Let W1 be the work done in taking away a satellite from the [...]

Assertion : Areal velocity of a planet around sun will becomes two times if mass of planet is halved Reason : Areal velocity =L/2m, Where L is angular momentum of planet about centre of sun. Assertion : Areal velocity of a planet around sun will becomes two times if mass of planet is halved Reason [...]

Assertion : Two spherical shells have masses m1andm2. Their radii are r1andr2. Let r be the distance of a point from centre. Then gravitational field strength and gravitational potential both are equal to zero for O Assertion : Angular momentum of a planet is constant about any point Reason : For acting on the planet [...]

Assertion : Mass of the rod AB is m1 and of particle P is m2. Distance between centre of rod and particle is r. Then the gravitational force between the rod and the particle is F=Gm1m2/r^2 Reason : The relation F=Gm1m2/r^2 can be applied directly only to find force between two particles. Assertion : Angular [...]

Assertion : Kepler’s law for planetary motion are consequence of Newton’s laws Reason : Kepler’s laws can be derived by using Newton’s laws. Assertion : Kepler's law for planetary motion are consequence of Newton's laws Reason : Kepler's laws can be derived by using Newton's laws. September 18, 2020 Category: Arihant Physics by D.C Pandey [...]

Assertion : If the product of surface area and density us is same for two planets, escape velocities will be same for both. Reason : Product of surface area and density is proportional to the mass of the planet per unit radius the planet. Assertion : If the product of surface area and density us [...]

Assertion : The binding energy of a satellite does not depend upon the mass of the satellite. Reason : Binding energy is the negative value of total energy of satellite. Assertion : The binding energy of a satellite does not depend upon the mass of the satellite. Reason : Binding energy is the negative value [...]