Gravitation Tes...

If the earth is replaced by a small point sized particle of the same mass, it is the geodesic centre. How will the force of gravity change at the present surface of the earth? (Assuming the earth to be a perfect sphere)

What causes tides?
(i) Attraction of sun
(ii) Attraction of moon
(iii) Attraction of earth

If somehow, the distance between the Sun and Earth is doubled, then the gravitational force between them will become

At what height above the Earth's surface is the acceleration due to gravity 1% less than its value at the surface?

A planet has twice the values of mass and radius as of Earth. Acceleration due to gravity on the surface of this planet is

Two planets have radii r₁ and r₂ and densities d₁ and d₂. The ratio of acceleration due to gravity on them will be

The rate of fall of g on going up the earth's surface is ______ the rate when going down the earth's surface.

The weights of an object in a coal mine, at sea level and on the top of a mountain are W₁, W₂ and W₃, respectively. Which of the following relations holds true?

An object shoots off perpendicularly from the earth with a velocity 4/5 times the escape velocity. What will be the maximum height from the surface of the earth up to which the object will rise? (Given: R = radius of earth)

Which of the following statements are true?
(i) Orbital velocity is more than escape velocity.
(ii) Escape velocity is times the orbital velocity.
(iii) Orbital velocity increases with radius.
(iv) A body with a velocity equal to the orbital velocity will orbit the planet in a circular path.

Escape velocity of a projectile from the surface of earth is about

A pendulum has a velocity v at the lowest point. What is the maximum height reached by it?

An object is orbiting at double its original radius. Its orbital velocity has changed by a factor of

The mass of a satellite increases by a factor of two. The orbital velocity

Inside a satellite, orbiting very close the earth's surface, water does not fall out of a glass when it is inverted. Which of the following is the best explanation for this?

Which of the following is not a statement of Kepler's Law?

A planet goes around the sun twice as many times as earth in a given time interval.

A satellite going round the earth in a circular orbit loses some energy due to a collision. If its speed is v and distance from the earth is d, which of the following is correct?

When a planet moves around the sun, its

When a body moves with high speed, albeit, much below the speed of light, its mass