## A planet moves around the sun. At point ‘A,’ it is closest to the sun at distance ‘d1’, and its spee….

A planet moves around the sun. At point ‘A,’ it is closest to the sun at distance ‘d1‘, and its speed is ‘v1‘. At another point ‘B,’ if it is farthest from the sun at distance ‘d2‘. Its speed will be

## Imagine a new planet having the same density as that of Earth, but it is 3 times bigger than Earth i….

Imagine a new planet having the same density as that of Earth, but it is 3 times bigger than Earth in size. If the acceleration due to gravity on the surface of Earth is g and that on the surface of the new plant is gp, then

## A satellite orbiting Earth in a circular orbit of radius ‘R’ completes one revolution in ‘3h’. If or….

A satellite orbiting Earth in a circular orbit of radius ‘R’ completes one revolution in ‘3h’. If orbital radius of geostationary satellites is 36,000 km, what is the value of R?

## A satellite moves around Earth in a circular orbit of radius ‘R’ making a rev/day. A second satellit….

A satellite moves around Earth in a circular orbit of radius ‘R’ making a rev/day. A second satellite moving in a circular orbit, moves around Earth once in 8 days. The radius of the orbit of the second satellite is

## A body weighs 0.9 kgwt on the surface of Earth. What will be its weight on Mars, if Mars has a mass ….

A body weighs 0.9 kgwt on the surface of Earth. What will be its weight on Mars, if Mars has a mass which is 1/9 times that of Earth and radius 1/2 times that of Earth?

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## A planet is rotating around the sun in an elliptical orbit. If the lengths of semi-major and semi-mi….

A planet is rotating around the sun in an elliptical orbit. If the lengths of semi-major and semi-minor axes are ‘a’ and ‘b’ respectively, then, the square of time period will be proportional to

## The escape velocity from the surface of Earth is ve. The escape velocity from the surface of a plane….

The escape velocity from the surface of Earth is ve. The escape velocity from the surface of a planet whose mass and radius are three times that of Earth will be

## It is given that radius of Earth is ‘R’ and length of a day is ‘T’, the height of a geostationary sa….

It is given that radius of Earth is ‘R’ and length of a day is ‘T’, the height of a geostationary satellite is

## An asteroid of mass ‘m’ is approaching Earth, initially at a distance of 10Re with speed ‘vi’. It hi….

An asteroid of mass ‘m’ is approaching Earth, initially at a distance of 10Re with speed ‘vi‘. It hits the Earth with a speed of ‘vf‘ (Re and Me are radius and mass of Earth, respectively). In this case,

## A particle of mass ‘m’ is placed at a certain point on the line joining two heavy particles of masse….

A particle of mass ‘m’ is placed at a certain point on the line joining two heavy particles of masses ‘m1‘ and ‘m2‘, so that its distance from ‘m1‘ is ‘x1‘ and from ‘m2‘ is ‘x2‘. If a particle of mass ‘m’ experiences equal gravitational force due to ‘m1‘...

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