Suppose we represent the distance above the ground by a positive Integ

1.	Suppose we represent the distance above the ground by a positive Integer anothat below the ground by a negative integer. If an elevator descends at a rate ofSm/min and begins to descend from 15 m above the ground, what will be itsposition after 45 minutes?
Answer» Since downwards is negative, the velocity of the elevator is -5 m/min. Displacement from initial position = Velocity x Time = -5 m/min x 45 min = -225 m. However, since we started 15 m above ground, displacement from the ground level = -225 + 15 m = -210

Suppose we represent the distance above the ground by a positive Integer anothat below the ground by a negative integer. If an elevator descends at a rate ofSm/min and begins to descend from 15 m above the ground, what will be itsposition after 45 minutes?

Answer»

Since downwards is negative, the velocity of the elevator is -5 m/min.

Displacement from initial position = Velocity x Time = -5 m/min x 45 min = -225 m.

However, since we started 15 m above ground, displacement from the ground level = -225 + 15 m = -210