Gravitation questions
1239 published questions with worked solutions.
- Assertion: The time period of revolution of a satellite close to the surface of the earth is smaller than that of one revolving...
- Assertion: The speed of a satellite always remains constant in an orbit. Reason: The speed of a satellite depends on its path.
- Assertion: A planet moves faster when it is closer to the sun in its orbit, and vice versa. Reason: Orbital velocity in the orbit...
- Assertion: An astronaut in an orbiting space station above the Earth experiences weightlessness. Reason: An object moving around...
- At some point, both the gravitational potential and the gravitational field due to the earth are zero. This point is
- If a planet consists of a satellite whose mass and radius were both half that of the earth, the acceleration due to gravity at...
- The ratio of the radius of the earth to that of the moon is 10. The ratio of acceleration due to gravity on the earth and on the...
- A man inside an artificial satellite feels weightlessness because the force of attraction due to the earth is
- The mean radius of the earth's orbit round the sun is 1.5 10^ 11 m. The mean radius of the orbit of mercury round the sun is 6...
- The ratio of the radius of a planet A to that of planet B is r. The ratio of acceleration due to gravity on the two planets is x....
- Two identical satellites A and B are circulating round the earth at heights of R and 2R respectively (where R is the radius of...
- The acceleration due to gravity about the earth's surface would be half of its value on the surface of the earth at an altitude...
- The mass of the moon is 1 81 of the earth's, but the gravitational pull on the moon's surface is 16 of the earth's. It is due to...
- A bullet is fired vertically upwards with velocity v from the surface of a spherical planet. When it reaches its maximum height,...
- A man can jump 1.5 m high on Earth. He can jump on a planet to a height x metre. The density of the planet is 34 that of Earth,...
- Two satellites, A and B, have masses 3m and 2m respectively. A is in a circular orbit of radius R, and B is in a circular orbit...
- A satellite is launched into a circular orbit of radius R around the earth, while a second satellite is launched into an orbit of...
- A spaceship is in a circular orbit close to the earth's surface. What additional velocity (in km/s) must be imparted to the ship...
- Two satellites S_1 and S_2 revolve around a planet in coplanar circular orbits in the same sense. Their periods of revolution are...
- The density of the core of a planet is _1 and that of the outer shell is _2. The radii of the core and of the planet are R and 3R...
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