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Two planets A and B have the same material density. If the radius of A is twice that of B, then the ratio of escape velocity `(v_A)/(v_B)`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Escape velocity on earth is `11.2 kms^(-1)`, what would be the escape velocity on a planet whose mass is 1000 times and radius is 10 times that of

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The time period of a satellite in a circular orbit around a planet is independent

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An artificial satellite is revolving around the earth, close to its surface. Find the orbital velocity of artificial satellite? (Take, radius of earth = 6400

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two satellites A and B go around a planet P in circular orbits having radius `4 R and R`, respectively. If the speed of satellite A is `3v`, then the speed of satellite B will

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy `E_0`. Its potential energy and kinetic energy respectively

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The kinetic energy of the satellite in a circular orbit with speed `v` is given

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The time period of geo-stationary satellite

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Geo-stationary satellites are placed in equatorial orbits at the height

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An astronaut experiences weightlessness in a space satellite. It is

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A pendulum beats sounds on the earth. Its time period on a stationary satellite of the earth will

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Weight of a body is maximum at

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The ratio of the magnitude of potential energy and kinetic energy of a satellite is

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Weightlessness experienced while orbiting the earth in spaceship, is the result of

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If the gravitational attraction of earth suddenly disappears, then which of the following statement is

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Study the following statements and choose the incorrect option. I. `G` is not equal to `6.67 xx 10^(-11)Nm^(-2)kg^(-2)` on the surface of earth.II. The escape velocity on the surface of earth is lesser than the escape velocity from moon’s surface. III. The angular momentum of a satellite going around the earth remains conserved.IV. The relation, `g=(GM)/r^2` holds good for r all the celestial

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Match the Column I (quantities) with Column II (approximate values) and select the correct answer from the codes given below. Column I Column II A. Escape velocity of earth p. `1.6 m'/'s^2` B. Gravitational acceleration at moon’s surface q. `6400 km` C. Radius of earth r. `11.2 km'/'s`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A satellite of mass m revolving with a velocity v around the earth. With reference to the above situation, match the Column I (types of energy) with Column II (expression) and select the correct answer from the codes given below. Column I Column II A. Kinetic energy of the satellite p. `-1/2mv^2` B. Potential energy of the satellite q. `1/2mv^2` C. Total energy of the satellite r. `-mv^2`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion: Newton’s law of universal gravitation states that a particle attracts every other particle in the universe using a force of attraction that is directly proportional to the product of their masses and inversely proportional to the square of distance between them.Reason: Law of gravitation is analogous to magnetic force between the moving

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion: The value of acceleration due to gravity does not depend upon mass of the body on which force is applied. Reason: Acceleration due to gravity is a variable

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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