Physics Test 192

A body of mass 60g experiences a gravitational force of 3.0N, when placed at a particular point. The magnitude of the gravitational field intensity at that point is

A gravitational field is present in a region and a mass is shifted from A to B through different paths as shown. If W₁ W₂ and W₃ represent the work done by the gravitational force along the respective paths, then:

The ratio of Coulomb's electrostatic force to the gravitational force between an electron and a proton separated by some distance is 2.4 × 10³⁹. The ratio of the proportionality constant,  to the Gravitational constant G is nearly (Given that the charge of the proton and electron each =1.6 × 10⁻¹⁹C, the mass of the electron = 9.11 × 10⁻³¹kg, the mass of the proton = 1.67×10⁻²⁷kg ) :

A particle of mass m is projected vertically upward from the surface of the Earth with a speed  v = kV_e ​, where V_e is the escape velocity from Earth and 0 < k < 1. What is the maximum height above the Earth's surface reached by the particle?

The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is

The time period of a geostationary satellite is 24 h, at a height 6R_E (R_E is radius of earth) from surface of earth. The time period of another satellite whose height is 2.5R_E from surface will be

If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will

A satellite of mass m is orbiting the earth (of radius R) at a height h from its surface. The total energy of the satellite in terms of g₀, the value of acceleration due to gravity at the earth’s surface, is

The ratio of escape velocity at earth (v_e) to the escape velocity at a planet (v_p) whose radius and mean density are twice as that of earth is