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A large truck is moving at [tex]$22.0 \, \text{m/s}$[/tex]. If its momentum is [tex]$125,000 \, \text{kg} \cdot \text{m/s}$[/tex], what is the truck's mass?

A. 176 kg
B. 2750 kg
C. 5680 kg
D. 11,400 kg

Answer :

To find the truck's mass from its momentum and velocity, you can use the formula for momentum:

[tex]\[ \text{momentum} = \text{mass} \times \text{velocity} \][/tex]

Here, you are given the truck's momentum as [tex]\(125,000 \, \text{kg} \cdot \frac{\text{m}}{\text{s}}\)[/tex] and its velocity as [tex]\(22.0 \, \text{m/s}\)[/tex]. You need to solve for the truck's mass ([tex]\(\text{mass}\)[/tex]).

### Step-by-Step Solution:

1. Start with the momentum formula:

[tex]\[ \text{momentum} = \text{mass} \times \text{velocity} \][/tex]

2. Rearrange the formula to solve for mass:

[tex]\[ \text{mass} = \frac{\text{momentum}}{\text{velocity}} \][/tex]

3. Plug in the given values:

[tex]\[ \text{mass} = \frac{125,000 \, \text{kg} \cdot \frac{\text{m}}{\text{s}}}{22.0 \, \text{m/s}} \][/tex]

4. Perform the division:

[tex]\[ \text{mass} = 5681.818181818182 \, \text{kg} \][/tex]

The closest answer choice to this calculated mass is [tex]\(5680 \, \text{kg}\)[/tex].

Therefore, the truck's mass is approximately [tex]\(5680 \, \text{kg}\)[/tex].

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