For a particle to leave from earth's gravitation field it should be projected with a minimum velocity. Derive an expression for this velocity.

For a particle to leave from earth's gravitation field it should be projected with a minimum velocity. What is the magnitude of this velocity when this particle is projected from another planet whose mass and radius is twice that of the earth?

For a particle to leave from the earth's field, it should be projected with a minimum velocity. Name the velocity.

For a particle to leave from the earth's field, it should be projected with a minimum velocity. Find the period of a simple pendulum, if this experiment is performed inside a satellite?

For a particle to leave from the earth's field, it should be projected with a minimum velocity. An elephant and an ant are to be projected from earth into space. Whether the velocities required for doing so are the same or different? Justify your answer.

For a particle to overcome the gravitational pull of the Earth, it is projected with a minimum velocity. A ball bounces more on the surface of the moon than on the earth. Explain why?

A particle of charge q is moving through a uniform magnetic field of intensity B with a velocity v. Write an expression for the force acting on the particle in a vector form.

Weight of a body depends directly on 'g'. The value of 'g' depends on many factors like shape of earth, rotation of earth etc. Derive the expression for orbital and escape velocity.