Centripetal force due to the earth's rotation
Earth's gravitational pull
Pressure of the atmosphere
Moon's gravitational pull
Answer is Right!
Answer is Wrong!
The correct answer is: B. Earth’s gravitational pull.
Escape velocity is the minimum speed required for an object to escape the gravitational pull of a massive body. For Earth, the escape velocity is about 11.2 km/s. This means that if a rocket is launched from Earth with a speed of at least 11.2 km/s, it will escape Earth’s gravity and will never return.
The other options are incorrect because they are not forces that can prevent an object from escaping Earth’s gravity.
- Option A: Centripetal force is a force that acts towards the center of a circle. It is not a force that can prevent an object from escaping Earth’s gravity.
- Option C: Pressure of the atmosphere is a force that acts perpendicular to the surface of Earth. It is not a force that can prevent an object from escaping Earth’s gravity.
- Option D: Moon’s gravitational pull is a force that acts towards the Moon. It is not a force that can prevent an object from escaping Earth’s gravity.
In conclusion, the escape velocity of a rocket fired from the earth towards the moon is a velocity to get rid of the Earth’s gravitational pull.