High School

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A bicycle has a momentum of [tex]$36 \, \text{kg} \cdot \text{m} / \text{s}$[/tex] and a velocity of [tex]$4 \, \text{m} / \text{s}$[/tex]. What is the mass of the bicycle?

A. 9 kg
B. 32 kg
C. 40 kg
D. 144 kg

Answer :

Sure, let's solve this step by step!

We are given:
- The momentum of the bicycle: [tex]\(36 \, \text{kg} \cdot \text{m} / \text{s}\)[/tex]
- The velocity of the bicycle: [tex]\(4 \, \text{m} / \text{s}\)[/tex]

We need to find the mass of the bicycle.

The formula that connects momentum ([tex]\(p\)[/tex]), mass ([tex]\(m\)[/tex]), and velocity ([tex]\(v\)[/tex]) is:
[tex]\[ p = m \times v \][/tex]

To find the mass ([tex]\(m\)[/tex]), we can rearrange this formula:
[tex]\[ m = \frac{p}{v} \][/tex]

Now, let's plug in the given values:
[tex]\[ p = 36 \, \text{kg} \cdot \text{m} / \text{s} \][/tex]
[tex]\[ v = 4 \, \text{m} / \text{s} \][/tex]

[tex]\[ m = \frac{36 \, \text{kg} \cdot \text{m} / \text{s}}{4 \, \text{m} / \text{s}} \][/tex]

When we divide 36 by 4, we get:
[tex]\[ m = 9 \, \text{kg} \][/tex]

Therefore, the mass of the bicycle is [tex]\(9 \, \text{kg}\)[/tex].

So, the correct answer is:
[tex]\[ \boxed{9 \, \text{kg}} \][/tex]

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Rewritten by : Barada