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Question

How does the weight of an object on the Moon compare to its weight on Earth?

The correct answer is
It is one-sixth of its weight on Earth.

The question asks about comparing the weight of an object on the Moon with its weight on Earth. To answer this, let's first understand the difference in gravitational forces on the Moon and Earth.

Weight is the force exerted by gravity on an object. It is calculated using the formula:

\(W = mg\)

where:

  • \(W\) = weight of the object
  • \(m\) = mass of the object
  • \(g\) = acceleration due to gravity

On Earth, the acceleration due to gravity \((g_{earth})\) is approximately \(9.8 \, m/s^2\). However, on the Moon, the acceleration due to gravity \((g_{moon})\) is about \(1.63 \, m/s^2\).

To compare the weights:

1. The weight on the Moon can be expressed as:

\(W_{moon} = mg_{moon}\)

2. The weight on Earth can be expressed as:

\(W_{earth} = mg_{earth}\)

3. To find the relationship between \(W_{moon}\) and \(W_{earth}\), divide the weight on the Moon by the weight on Earth:

\(\frac{W_{moon}}{W_{earth}} = \frac{mg_{moon}}{mg_{earth}} = \frac{g_{moon}}{g_{earth}}\)

4. Substitute the known values:

\(\frac{g_{moon}}{g_{earth}} = \frac{1.63}{9.8} \approx \frac{1}{6}\)

Therefore, the weight of an object on the Moon is approximately one-sixth of its weight on Earth. This leads to the conclusion:

Correct Answer: It is one-sixth of its weight on Earth.

This understanding is crucial for various applications, including space missions and understanding gravitational effects.

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Important Questions from Gravitation

  1. Which one of the following statement is true for the relation, \(F= \frac{{G{m_1}{m_2}}}{{{r^2}}}\) ?

    (All symbols have their usual meanings)
  2. The free-fall acceleration g increases as one proceeds, at sea level, from the equator toward either pole. The reason is

  3. A planet has a mass M 1and radius R 1. The value of acceleration due to gravity on its surface is g 1. There is another planet 2, whose mass and radius both are two times that of the first planet. Which one of the following is the acceleration due to gravity on the surface of planet 2?

  4. Two bodies of mass M each are placed R distance apart. In another system, two bodies of mass 2M each are placed R/2 distance apart. If F be the gravitational force between the bodies in the first system, then the gravitational force between the bodies in the second system will be

  5. Suppose the force of gravitation between two bodies of equal masses is F. If each mass is doubled keeping the distance of separation between them unchanged, the force would become

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