Question

select the correct answer. consider this image. a student first walked from the entrance to the lab and then walked from the lab to the classroom. which statement describes the students position? select the correct option. the student walked 15 m to a negative position, then another 20 m in a negative position. the student walked 15 m to a negative position then walked another 20 m to a positive position. the student walked 15 m to a positive position and then walked from -15 m to 20 m to a negative position. the student walked 15 m to a negative position and then walked from -15 m to 20 m to a positive position.

Explanation:

Step1: Analyze the first part of the student's movement

The entrance is at position \(0\) m. The lab is at position \(- 15\) m. The distance from the entrance (\(0\) m) to the lab (\(-15\) m) is \(|0 - (-15)|=15\) m. Since \(-15<0\), the student walked \(15\) m to a negative position.

Step2: Analyze the second part of the student's movement

The lab is at \(-15\) m and the classroom (class \(9A\)) is at \(20\) m. The distance from the lab (\(-15\) m) to the classroom (\(20\) m) is \(|20-(-15)| = |20 + 15|=35\) m. Also, \(20>0\), so the student walked from a negative position (\(-15\) m) to a positive position (\(20\) m).

Answer:

The student walked \(15\) m to a negative position and then walked from \(-15\) m to \(20\) m to a positive position.