Choose the correct alternative.

1. If the zero of potential energy is at infinity, the total energy of an orbiting satellite is negative of its kinetic energy.
2. If the zero of potential energy is at infinity, the total energy of an orbiting satellite is negative of its potential energy.
3. The energy required to launch an orbiting satellite out of earth’s gravitational influence is more than the energy required to project a stationary object at the same height (as the satellite) out of earth’s influence.
4. Both (1) and (3) are correct.

Subtopic:  Gravitational Potential Energy |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A rocket is fired vertically with a speed of \(5\) km/s from the earth’s surface. How far from the earth does the rocket go before returning to the earth?
1. \(8\times10^6\) m
2. \(1.6\times10^6\) m
3. \(6.4\times10^6\) m
4. \(12\times10^6\) m

Subtopic:  Gravitational Potential Energy |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links

A spaceship is stationed on Mars. How much energy must be expended on the spaceship to launch it out of the solar system? (Mass of the space ship = 1000 kg; mass of the sun = 2×1030 kg; mass of mars = 6.4×1023 kg; radius of mars = 3395 km; radius of the orbit of mars = 2.28×108 km; = 6.67×10-11N m2 kg-2.)
1. 11 × 1010 J
2. 6 × 1011 J
3. 6.67 × 1010 J
4. 7.12 × 1011 J

Subtopic:  Gravitational Potential Energy |
 51%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links

A rocket is fired vertically from the surface of mars with a speed of 2 km/s. If 20% of its initial energy is lost due to martian atmospheric resistance, how far will the rocket go from the surface of Mars before returning to it?

(Mass of mars = 6.4×1023 kg; radius of mars = 3395 km; G = 6.67×10-11 N m2 kg-2.)

1. 477.2 km
2. 550.5 km
3. 493.9 km
4. 517.3 km

Subtopic:  Gravitational Potential Energy |
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links