Cengage JEE Mains Physics by B.M Sharma

The value of g at a certain height h above the free surface of the earth is x/4 where x is the value of g at the surface of the earth. The height h is The value of g at a certain height h above the free surface of the earth is x/4 where x [...]

A tunnel is dug along a diameter of the earth. If Me​ and Re​ are the mass and radius, respectively, of the earth, then the force on a particle of mass m placed in the tunnel at a distance r from the centre is : A tunnel is dug along a diameter of the earth. [...]

A uniform ring of mass m and radius r is placed directly above a uniform sphere of mass M and of equal radius. The centre of the ring is directly above the centre of the sphere at a distance r root 3 as shown in the figure. The gravitational force exerted by the sphere on [...]

In order to shift a body of mass m from a circular orbit of radius 3R to a higher orbit of radius 5R around the earth, the work done is? In order to shift a body of mass m from a circular orbit of radius 3R to a higher orbit of radius 5R around the [...]

If the mass of a planet is 10% less than that of the earth and the radius is 20% greater than that of the earth, the acceleration due to gravity on the plant will be If the mass of a planet is 10% less than that of the earth and the radius is 20% greater [...]

What is the mass of the planet that has a satellite whose time period is T and orbital radius is r? What is the mass of the planet that has a satellite whose time period is T and orbital radius is r? September 13, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter [...]

The minimum energy required to launch a m kg satellite from earth’s surface in a circular orbit at an altitude of 2R where R is the radius of earth is The minimum energy required to launch a m kg satellite from earth's surface in a circular orbit at an altitude of 2R where R is [...]

Two satellites A and B of the same mass are revolving around the earth in the concentric circular orbits such that the distance of satellite B from the centre of the earth is thrice as compared to the distance of the satellite A from the centre of the earth. The ratio of the centripetal force [...]

A planet is revolving around the sun as shown in elliptical path. the correct option is A planet is revolving around the sun as shown in elliptical path. the correct option is September 13, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 10 - Gravitation ,

Figure shows two shells of masses m1​ and m2​. The shells are concentric. At which point, a particle of mass m shall experience zero force? a particle of mass m shall experience zero force? Figure shows two shells of masses m1​ and m2​. The shells are concentric. At which point September 13, 2020 Category: Cengage [...]