Momentum data about the same objects in the same closed system is shown below.

\begin{tabular}{|c|c|c|}
\hline
Trial & \begin{tabular}{c}
Initial \\
Momentum \\
[tex]$( kg \cdot m / s )$[/tex]
\end{tabular} & \begin{tabular}{c}
Final \\
Momentum \\
[tex]$( kg \cdot m / s )$[/tex]
\end{tabular} \\
\hline
1 & 3.5 & 3.5 \\
\hline
2 & 3.7 & 3.7 \\
\hline
3 & 3.4 & 3.4 \\
\hline
4 & [tex]$X$[/tex] & 3.6 \\
\hline
\end{tabular}

What value should be in place of [tex]$X$[/tex]?

A. 3.4

B. 3.5

C. 3.6

D. 3.7



Answer :

To determine the correct value for [tex]\( X \)[/tex] in the closed system, we need to understand that in a closed system, the law of conservation of momentum states that the initial momentum must be equal to the final momentum.

Given the data:
- In trial 1, the initial momentum is 3.5 kg·m/s, and the final momentum is 3.5 kg·m/s.
- In trial 2, the initial momentum is 3.7 kg·m/s, and the final momentum is 3.7 kg·m/s.
- In trial 3, the initial momentum is 3.4 kg·m/s, and the final momentum is 3.4 kg·m/s.
- In trial 4, the final momentum is given as 3.6 kg·m/s.

According to the conservation of momentum, the initial momentum for trial 4 must be equal to the final momentum for trial 4.

Therefore, the value for [tex]\( X \)[/tex] should be 3.6 kg·m/s since the initial momentum must equal the final momentum in a closed system.

So, the correct value in place of [tex]\( X \)[/tex] is:

3.6