Gravitation Tes...

The path of a planet around the sun is elliptical as shown in the figure.Its velocity is the greatest at

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

Compare the area swept by the line joining planet and sun at apogee (closest point in orbit) and perigee (farthest point in orbit) during a time interval `T`.

The radius of a planet`s orbit increases by a factor of eight. Correspondingly,time period changes

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

Let v_o be the velocity of orbit around a planet. The escape velocity of the planet is

The path of an object released from earth at a velocity less than escape velocity and more than orbital velocity is called

The acceleration due to earth`s gravity ______ when we go a little distance inside the earth. It ______ when we go a little distance above the earth.

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

An object is at a height R/2 above earth, what is the value of acceleration due to gravity at the instant?

What is the gravitational potential energy of the following system?


The masses are on the four sides of a square of side a. (Find k if the answer is kGm²/a.)

What is the gravitational potential at the surface of earth?(Assume zero at infinity.)

What is the change in potential energy of a mass `m` as it moves from a distance d to d/2 from a mass `M`?

Gravity is a conservative force. Which of the following is incorrect?

Escape velocity from earth is approximately

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

What is the orbital velocity of a satellite orbiting the earth just at the surface?

What is the change in potential energy as a body climbs a distance h and descends a distance h/2? (Assuming g being constant)

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

Time period of a pendulum is independent of

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

Two bodies of mass 2 m and 3 m are approaching each other at velocity 4v and 5v respectively. After a while their velocities become 6v and 7v respectively. What is the total change in potential energy?

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

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

An object shoots off perpendicularly from the earth with a velocity 4/5 of the escape velocity. Upto what height will it fly before coming crashing down?

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.

The acceleration due to gravity on moon is one-sixth that on earth. A high-jumper can jump 2 m on earth. What distance can he jump on the moon?