High School

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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. [tex][tex]$11,400 \, \text{kg}$[/tex][/tex]

Answer :

To find the mass of the truck, we can use the formula for momentum:

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

Given that the momentum is [tex]\( 125,000 \, \text{kg} \cdot \frac{m}{s} \)[/tex] and the velocity is [tex]\( 22.0 \, \text{m/s} \)[/tex], we can solve for the mass by rearranging the formula:

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

Substitute the known values into the equation:

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

Now, divide the momentum by the velocity:

[tex]\[ \text{mass} = 5,681.818181818182 \, \text{kg} \][/tex]

Since the problem provides choices for the mass, rounding the result to the nearest whole number gives us approximately:

[tex]\[ 5,680 \, \text{kg} \][/tex]

Therefore, the mass of the truck is [tex]\( 5,680 \, \text{kg} \)[/tex].

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