The Rocket Club is planning to launch a pair of model rockets. To build the rocket, the club needs a rocket body paired with an engine. The table lists the mass of three possible rocket bodies and the force generated by three possible engines.

\begin{tabular}{|c|c|c|c|}
\hline
Body & Mass (kg) & Engine & Force (N) \\
\hline
1 & 0.500 & 1 & 25 \\
\hline
2 & 1.5 & 2 & 20 \\
\hline
3 & 0.750 & 3 & 30 \\
\hline
\end{tabular}

Based on Newton's laws of motion, which combination of rocket bodies and engines will result in an acceleration of [tex]$40 \, \text{m/s}^2$[/tex] at the start of the launch?

A. Body 3 + Engine 1
B. Body 2 + Engine 2
C. Body 1 + Engine 2
D. Body 1 + Engine 1



Answer :

To determine which combination of rocket bodies and engines will result in an acceleration of [tex]\( 40 \, \text{m/s}^2 \)[/tex] at the start of the launch, we can use Newton's second law of motion, which states:

[tex]\[ F = m \cdot a \][/tex]

Where:
- [tex]\( F \)[/tex] is the force in Newtons (N)
- [tex]\( m \)[/tex] is the mass in kilograms (kg)
- [tex]\( a \)[/tex] is the acceleration in meters per second squared ([tex]\(\text{m/s}^2\)[/tex])

We can rearrange this equation to solve for acceleration:

[tex]\[ a = \frac{F}{m} \][/tex]

We need to check each combination of rocket body and engine to see if the acceleration is [tex]\( 40 \, \text{m/s}^2 \)[/tex].

### Combinations to Check

1. Body 1 (mass = 0.500 kg) + Engine 1 (force = 25 N):
[tex]\[ a = \frac{25 \, \text{N}}{0.500 \, \text{kg}} = 50 \, \text{m/s}^2 \][/tex]

2. Body 2 (mass = 1.5 kg) + Engine 2 (force = 20 N):
[tex]\[ a = \frac{20 \, \text{N}}{1.5 \, \text{kg}} = \frac{20}{1.5} = 13.33 \, \text{m/s}^2 \][/tex]

3. Body 3 (mass = 0.750 kg) + Engine 3 (force = 30 N):
[tex]\[ a = \frac{30 \, \text{N}}{0.750 \, \text{kg}} = 40 \, \text{m/s}^2 \][/tex]

4. Body 1 (mass = 0.500 kg) + Engine 2 (force = 20 N):
[tex]\[ a = \frac{20 \, \text{N}}{0.500 \, \text{kg}} = 40 \, \text{m/s}^2 \][/tex]

### Suitable Combinations

Based on the calculations:

- Body 3 + Engine 3 results in an acceleration of [tex]\( 40 \, \text{m/s}^2 \)[/tex].
- Body 1 + Engine 2 also results in an acceleration of [tex]\( 40 \, \text{m/s}^2 \)[/tex].

Hence, the suitable combinations that result in an acceleration of [tex]\( 40 \, \text{m/s}^2 \)[/tex] at the start of the launch are:

- Body 3 + Engine 3
- Body 1 + Engine 2