An object weighs 18 N when measured on the surface of the earth. What would be its weight when measured on the surface of the moon?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2: 3 N.
Explanation:
According to the principles of physics, the weight of an object depends on the gravitational force acting upon it. The gravitational force of the Moon is approximately 1/6th of the gravitational force of the Earth.
Formula:
- Weight on the Moon = 1/6 × Weight on Earth
- Calculation:
- Weight of the object on Earth = 18 N (Newtons)
- Weight of the object on the Moon = 1/6 × 18
- Weight of the object on the Moon = 3 N
Additional Information (from an Exam Perspective):-
Value of g: The acceleration due to gravity (g) on the Earth's surface is approximately 9.8 m/s², whereas on the Moon, it is approximately 1.62 m/s².
Important Point: If the question had provided the object's mass, that mass would remain exactly the same on the Moon as it is on Earth. Only the weight changes.
Important Questions for Upcoming Exams:
Question: If the mass of an object on Earth is 60 kg, what will be its mass on the Moon?
Answer: 60 kg (Mass never changes).
Question: Who formulated the Universal Law of Gravitation?
Answer: Sir Isaac Newton. Question: What would be the weight of an object at the center of the Earth?
Answer: Zero (0), because the value of 'g' is zero there.