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A 45 kg girl is standing on an apparatus that has a mass of 100 kg. The apparatus is free to slide in a horizontal direction. What is the total mass of the girl and the apparatus?

A) 45 kg
B) 100 kg
C) 145 kg
D) 55 kg

Answer :

Final answer:

The total mass of the girl and the apparatus is c) 145 kg, which is the sum of the girl's mass and the apparatus's mass.

Explanation:

The total mass of the 45 kg girl and the 100 kg apparatus is calculated by simply adding the mass of the girl to the mass of the apparatus. Therefore, the combined mass is:

Mass of girl + Mass of apparatus = 45 kg + 100 kg = 145 kg.

This is how the total mass of two objects is found when they are put together, which is essential when considering concepts such as momentum and Newton's Second Law of Motion.

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