Chapter 10 – Gravitation

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 [...]

Assertion : Angular momentum of a planet is constant about any point Reason : For acting on the planet is a central force. Assertion : Angular momentum of a planet is constant about any point Reason : For acting on the planet is a central force. September 18, 2020 Category: Arihant Physics by D.C Pandey [...]

Assertion : Four point masses each of mass m are placed at points 1, 2, 3 and 6 of a regular hexagon of side a. Then the gravitational field at the centre of hexagon is Gm/a^2 Reason : The field strength due to masses at 3 and 6 are cancelled out. 2 3 and 6 [...]

Assertion : The centre of semicircular ring of mass m and radius R is the origin O. The potential at origin is −Gm/R Reason : The gravitational field strength is towards Y-axis. Assertion : The centre of semicircular ring of mass m and radius R is the origin O. The potential at origin is −Gm/R [...]

Assertion : Gravitational force between two masses in air is F. If they are immersed in water, force will remain F Reason : Gravitational force does not depend on the medium between the masses. Assertion : Gravitational force between two masses in air is F. If they are immersed in water force will remain F [...]

Assertion : If gravitational potential at some point is zero, then gravitational field strength at that point will also be zero. Reason : Except at infinity gravitational potential due to a system of point masses at some finite distance can’t be zero. Assertion : If gravitational potential at some point is zero then gravitational field [...]

If density of earth increased 4 times and its radius become half of what it is, our weight will ? If density of earth increased 4 times and its radius become half of what it is our weight will ? September 18, 2020 Category: Arihant Physics by D.C Pandey , Chapter 10 - Gravitation , [...]

The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : 2. The acceleration due to gravity on the planets will be in ratio The diameters of two planets are in the ratio 4 : 1 and their mean densities in the ratio 1 : [...]