Question

Elevator 1 moved up 10 feet from the ground level. Its position is labeled as +10. Elevator 2 moved down 5 feet from the ground level. Its position is labeled as _____.

Answer 1

Its position is labeled as -5

Explanation:

For elevator 1.

Its position after moving 10 ft up is;

p1 = r + 10

r = reference position.

given that p1 = +10

+10 = r + 10

r = 10 - 10 = 0

The reference position (ground floor) is zero

Since the Elevator 2 moves downward from the reference position (ground floor), it moves in the negative direction.

Its position can be written as;

p2 = r - 5 = 0 - 5 (since r = 0)

p2 = -5

Its position is labeled as -5