Question

The average mass of a adult is 87kg. Find the mass and the weight of an 87kg man on the moon where the gravitational field is one sixth that of the earth

Answer 1

1. The mass of the man on the moon is 87 Kg

2. The weight of the man on the moon is 141.81 N

1. Determination of the mass of the man on the moon.

Mass is simply defined as the quantity of matter in a body. The mass of an object is constant irrespective of its location.

With the above information in mind, we can determine the mass of the man on the moon.

Mass of man on earth = 87 Kg

Mass of man on moon = mass of man on earth

Thus,

Mass of man on moon = 87 Kg

2. Determination of the weight of the man on the moon

Mass (m) = 87 Kg

Acceleration due to gravity of earth (gₑ) = 9.8 m/s²

Acceleration due to gravity of moon (gₘ) = 9.8 × 1/6 = 1.63 m/s²

Weight on the moon (Wₘ) =?

Wₘ = m × gₘ

Wₘ = 87 × 2.63

Wₘ = 141.81 N

Therefore, the weight of the man on the moon is 141.81 N

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