Question:
During a journey from earth to moon and back, the greatest energy required from the rocket of the space ship is to overcome
During a journey from earth to moon and back, the greatest energy required from the rocket of the space ship is to overcome
Updated On: Jun 14, 2022
- the moons gravity at lunar landing
- the moons gravity at lunar take off
- the earths gravity at re-entry into earths atmosphere
- the earths gravity at take off
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The Correct Option is D
Solution and Explanation
: The greatest energy is required to overcome the earths gravity at take off.
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Concepts Used:
Newtons Laws of Motion
Newton’s First Law of Motion:
Newton’s 1st law states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it.
Newton’s Second Law of Motion:
Newton’s 2nd law states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the object’s mass.
Mathematically, we express the second law of motion as follows:
Newton’s Third Law of Motion:
Newton’s 3rd law states that there is an equal and opposite reaction for every action.