Gravitation Tes...

The escape velocity for a planet is v_e. A particle is projected from its surface with a speed v. For this particle to move as a satellite around the planet.

If the earth is at one fourth of its present distance from the sun, the duration of the year will be changed by

In an earth’s satellite, the astronaut stands on a platform. His weight as indicated by the balance will be

Which of the following graphs between the square of the time period and cube of the distance of the planet from the sun is correct?

Two satellites A and B go round a planet P in circular orbits having radii 4R and R respectively. If the speed of the satellite A is 3V, the speed of satellite B will be

If the distance between earth and the sun were half of its present value, the no. of days in an year would have been

A body of mass ‘m’ is moved to a height ‘h’ equal to the radius of the earth. The increase in potential energy is

The mass of the moon is 7.34 × 10²² kg and the radius is 1.74 × 10⁶ m. The value of gravitational force field will be

A simple pendulum has a time period T₁ when on the earth’s surface, and T₂ when taken to a height R above the earth’s surface, where R is the radius of the earth.The value of T₁/T₂ is

Energy required to move a body of mass m from an orbit of radius 2R to 3R is (where M = mass of earth, R = radius of earth)