1:   If the radius of earth is reduced by 1%, the escape velocity will be ----------
Options:
4. remains the same

Explanation:

decreased by about 0.5% Discuss this in Forums

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2:   An inclined plane makes an angle 30 degree with the horizontal.A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal to ----
Options:
1. g/3
2. 2g/3
3. 5g/7
4. 5g/14

Explanation:

Sorry, No description available.

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3:   A diver in a swimming pool bends his head before diving ,because it---------
Options:
1. decrease his angular velocity
2. increase his moment of inertia
3. decrease his moment of inertia
4. all of the above

Explanation:

Sorry, No description available.

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4:   An orbiting satellite has --------
Options:
1. only kinetic energy
2. only potential energy
3. no energy
4. kinetic and potential energy

Explanation:

Sorry, No description available.

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5:   Unit of gravitational potential is --------
Options:
1. Joule
2. Joule kilogram
3. both of the above
4. Joule/kilogram

Explanation:

Sorry, No description available.

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6:   The acceleration due to gravity near the surface of a planet of radius R and density d is proportional to --------
Options:
1. d/R
2. R/d
3. dR
4. none of the above

Explanation:

Sorry, No description available.

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7:   The diameters of two planets are in the ratio 4:1and their mean densities are in the ratio 1:2.The acceleration due to gravity on the planets will be in the ratio of ----------
Options:
1. 1:2
2. 2:1
3. 2:3
4. 3:1

Explanation:

Sorry, No description available.

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8:   The ratio of energy required to raise a satellite to a height h above the earth surface to that required to put it into the orbit is -------
Options:
1. h:2R
2. 2h:R
3. R:h
4. h:R

Explanation:

Sorry, No description available.

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9:   What is not conserved in case of celestial bodies revolving around the sun all the time?
Options:
1. Mass
2. Angular momentum
3. Kinetic energy
4. all of the above

Explanation:

Sorry, No description available.

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10:   The centripetal force on a satellite orbiting around the earth and the gravitational force of earth acting on the satellite both equal F.The net force on the satellite is ------
Options:
1. zero
2. F
3. 1,414 F
4. none of the above

Explanation:

Sorry, No description available.

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If you continue doing what you have done in the past, you will get what you have received in the past.
-Avinash Narula