The student travels 4 × 3 = 12 m upward and then 2 × 3 = 6 m downward. Therefore, total distance = 18 m and displacement from the ground floor = 6 m upward.
A student runs from the ground floor to the fourth floor of a school building to collect a book and then comes down to their classroom on the second floor. If the height of each floor is 3 m, find: (i) the total vertical distance travelled and (ii) their displacement from the starting point.
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The height of each floor is 3 m. From the ground floor to the fourth floor, the student travels 4 × 3 = 12 m upward. From the fourth floor to the second floor, they travel 2 × 3 = 6 m downward. Therefore, total vertical distance travelled = 12 + 6 = 18 m. The final position is 6 m above the starting point, so displacement = 6 m upward.
For more NCERT Solutions of Class 9 Science Exploration Chapter 4 Describing Motion Around Us Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-4/