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

A. 176 kg
B. 2750 kg
C. 5680 kg
D. [tex][tex]$11,400 \, \text{kg}$[/tex][/tex]

Answer :

To find the mass of the truck, we start with the definition of momentum, which is given by the formula

[tex]$$
p = m \cdot v,
$$[/tex]

where
[tex]\( p \)[/tex] is the momentum,
[tex]\( m \)[/tex] is the mass, and
[tex]\( v \)[/tex] is the velocity.

We are given:
[tex]\( p = 125,\!000 \, \text{kg} \cdot \frac{\text{m}}{\text{s}} \)[/tex] and [tex]\( v = 22.0 \, \text{m/s} \)[/tex].

To isolate the mass [tex]\( m \)[/tex], we rearrange the formula:

[tex]$$
m = \frac{p}{v}.
$$[/tex]

Substituting the provided values into the formula, we have

[tex]$$
m = \frac{125,\!000}{22.0}.
$$[/tex]

Evaluating the division,

[tex]$$
m \approx 5681.82 \, \text{kg}.
$$[/tex]

Rounding to the nearest option, the mass of the truck is approximately

[tex]$$
5680 \, \text{kg}.
$$[/tex]

Thus, the correct answer is [tex]\( 5680 \, \text{kg} \)[/tex].

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