Gravitation Tes...

The escape velocity from Earth is 11.2 kms^-1. Another planet has mass 1000 times and radius 10 times that of Earth. The escape velocity at that planet will be

If the distance between Earth and the sun becomes 4 times as much, then the time period of revolution will become

The radius in kilometre, to which the present radius of Earth (R = 6400 km) is to be compressed, so that the escape velocity is increased to ten times, is

The apparent weight of a person inside a lift is 'w₁', when lift moves up with a certain acceleration; and 'w₂'_, when lift moves down with same acceleration. The weight of the person, when lift moves up with constant speed is:

If the radius of Earth decreases by 1% and its mass remains the same, then the acceleration due to gravity

A satellite moves in an elliptical orbit about a planet maximum and minimum velocities are 3 x 10⁴ m/s and 1 x 10³ m/s. What is the minimum distance of satellite from planet if maximum distance is 4 x 10⁴ km?

If Earth is supposed to be a sphere of radius 'R' and if '' is the value of acceleration due to gravity at a latitude of 30°, while 'g' is at the equator, the value of '(g - )' is

When the distance between Earth and the sun is halved, the duration of year will become

If the Earth stops rotating, the value of g at the equator will

An antenna is of height 500 m. What will be its range (Radius of the Earth is 6400 km)?

Three particles, each of mass 'm', are kept at the vertices of an equilateral triangle of side 'L'. The gravitational field at centre due to these particles is

The period of revolution of a planet around sun is 27 times that of Earth. The ratio of radius of planet's orbit to the radius of Earth's orbit is

Directions: The following question has four choices out of which ONLY ONE is correct.

What is time period of a simple pendulum hanging in a satellite? (T is time period on Earth)

If the value of escape velocity on a certain planet is 2 km/s, the value of orbital speed for a satellite orbiting close to its surface will be

A satellite is orbiting around the earth with orbital radius 'R' and time period 'T'. The quantity which does not depend on the size of satellite is

What is ratio of gravitational mass and inertial mass?

If a new planet is discovered rotating around the sun with the orbital radius double of that of Earth, what will be its time period (in earth's days)?

Astronauts look down on the Earth's surface from a space ship parked at an altitude of 500 km. They can resolve objects of the Earth of the size_____ (It can be assumed that the pupil's diameter is 5 mm and wavelength of light is 500 nm).

Two balls, each of radius R and of equal mass and density, are placed in contact. Then, the force of gravitation between them is proportional to

A person is sitting in a lift accelerating upwards. The measured weight of the person will be

Acceleration due to gravity 'g' for a body of mass 'm' is proportional to (Radius of Earth = r, Mass of Earth = M)

Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in circular orbit of radius 'R' around the sun will be proportional to:

The change in the value of 'g' at a height 'h' above the surface of Earth is the same as at a depth 'd' below the surface of Earth. When both 'd' and 'h' are much smaller than the radius of Earth, then which of the following expressions is correct?

The Earth moves in an elliptical orbit with the sun S at one of foci as shown in the figure. Its rotational kinetic energy is maximum at the point

A closed organ pipe of length 20 cm is sounded with tuning fork in resonance. What is frequency of tuning fork? (v = 332 m/s)