Question

An unmanned spacecraft leaves for Venus. Which statements about the spacecraft’s journey are true?

The weight of the spacecraft keeps changing.
The mass of the spacecraft keeps changing.
The weight of the spacecraft remains the same.
The mass of the spacecraft remains the same.
The gravitational pull on the spacecraft remains the same.

Answer 1

Answer:

The weight of the spacecraft keeps changing.

Explanation:

The weight of an object is given by:

$W=mg$

where

m is the mass of the object, which is an intrinsec property of the object, and it does not change, so it does not depend on the location of the object

g is the value of gravitational acceleration, which depends on the location of the object. The value of g is higher when the object is closer to a planet (due to the gravitational attraction), while it is almost zero in the space

Therefore, since the value of g changes, the weigth of the spacecraft g keeps changing as well.

Answer 2

The true statements about the spacecraft’s journey are:

• The weight of the spacecraft keeps changing.
• The mass of the spacecraft remains the same.

Definition of mass and weight

• Mass is simply defined as the quantity of matter present in an object. The mass of an object is constant irrespective of the location of the object.

• Weight is simply defined as the gravitational pull on an object. The weight of an object varies from place to place due to gravity.

Relationship between mass and weight

Mass and weight are related according to the following equation

Weight (W) = mass (m) × Acceleration due to gravity (g)

W = mg

With the above information in mind, we can conclude that the true statements of the spacecraft journey are:

• The weight of the spacecraft keeps changing.
• The mass of the spacecraft remains the same.

Learn more about mass and weight:

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