A body weighs 72 kg on the surface of the earth its weights on the surface of the moon will be:
Correct answer: B. 12kg
- A. 72 kg
- B. 12kg
- C. 24 kg
- D. 0kg
Explanation
The weight of an object on the surface of the moon can be calculated using the formula:Weight on the moon = Weight on the Earth× (Acceleration due to gravity on the moon / Acceleration due to gravity on the Earth)The acceleration due to gravity on the moon is about 1/6th of that on Earth.Weight on the moon = 72kg × (⅙)= 12kgTherefore, the weight of the body on the surface of the moon will be 12kg.
This question appeared on the ETEA MDCAT 2010 paper, which you can sit online with every answer explained.
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Every two masses attract each other with a force proportional to the product of their masses and inversely proportional to the square of their separation, expressed as F = Gm₁m₂/r². Questions also involve the gravitational constant, vector direction, superposition of gravitational forces, and the distinction between gravitational force and gravitational field strength.
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