Gravitation

Assertion : Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth. Reason : Orbital velocity of a satellite is greater than its escape velocity.

Taking the radius of the earth to be $6400 \mathrm{~km}$, by what percentage will the acceleration due to gravity at a height of $100 \mathrm{~km}$ from the surface of the earth differ from that on the surface of the…

A satellite is moving with a constant speed $v$ in a circular orbit about the earth. An object of mass $m$ is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of…

Average distance of the earth from the sun is $L_1$. If one year of the earth $=D$ days, one year of another planet whose average distance from the sun is $L_2$ will be

Earth orbiting satellite has solar energy collecting panel with total area $5 \mathrm{~m}^2$. If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is

A satellite is revolving around the earth with a kinetic energy $E$. The minimum addition of kinetic energy needed to make it escape from its orbit is

Assertion : Kepler's second law can be understood by conservation of angular momentum principle. Reason : Kepler's second law is related with areal velocity which can further be proved to be based on conservation of…

The change in the gravitational potential energy when a body of mass $m$ is raised to a height $n R$ above the surface of the earth is (here $R$ is the radius of the earth)

The additional kinetic energy to be provided to a satellite of mass $m$ revolving around a planet of mass $M$ to transfer it from a circular orbit of radius $R_1$ to another of radius $R_2\left(R_2>R_1\right)$ is

Time period of pendulum, on a satellite orbiting the earth, is

What will be the effect on the weight of a body placed on the surface of earth, if earth suddenly stops rotating?

A satellite is in an orbit around the earth. If its kinetic energy is doubled, then