- 1(current)
Q. No.| 1. | \(6 . 48 \times 10^{23} \text{ kg}\) | 2. | \(6 . 48 \times 10^{25} \text{ kg}\) |
| 3. | \(6 . 48 \times 10^{20} \text{ kg}\) | 4. | \(6 . 48 \times 10^{21} \text{ kg}\) |
Assume that a space shuttle flies in a circular orbit very close to the earth's surface. Taking the radius of the space shuttle's orbit to be equal to the radius of the earth (\(R\)) and the acceleration due to gravity to be \(g\), the time period of one revolution of the space shuttle is (nearly):
| 1. | \(\sqrt{\dfrac{2R}{g}}\) | 2. | \(\sqrt{\dfrac{\pi R}{g}}\) |
| 3. | \(\sqrt{\dfrac{2\pi R}{g}}\) | 4. | \(\sqrt{\dfrac{4\pi^2 R}{g}}\) |
The radii of circular orbits of two satellites A and B of the earth are \(4R\) and \(R\) respectively. If the speed of satellite A is \(3v,\) then the speed of satellite B will be:
1. \(3v/4\)
2. \(6v\)
3. \(12v\)
4. \(3v/2\)
For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is:
1.
2. \(2\)
3.
4.
The time period of an earth satellite in circular orbit is independent of:
| 1. | the mass of the satellite |
| 2. | radius of the orbit |
| 3. | none of them |
| 4. | both of them |
Two satellites A and B move around the earth in the same orbit. The mass of B is twice the mass of A. Then:
| 1. | speeds of A and B are equal. |
| 2. | the potential energy of earth \(+\) A is same as that of earth \(+\) B. |
| 3. | the kinetic energy of A and B are equal. |
| 4. | the total energy of earth \(+\) A is same as that of earth \(+\) B. |
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Q. No.
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