Final answer:
To find the mass of the wagon, use Newton's second law of motion, rearrange it to m = F / a, and substitute the given values to calculate the mass.
Step-by-step explanation:
The student's question revolves around how to calculate the mass of the wagon when a known force and acceleration are given. Using Newton's second law of motion, which states that force equals mass times acceleration (F = m * a), we can rearrange the equation to solve for mass (m = F / a). In this case, Astrid applies a force of 25 N, and the wagon accelerates at 3.44 m/s2, so the mass of the wagon would be calculated as m = 25 N / 3.44 m/s2, which equals approximately 7.27 kg.