Question

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Therefore, her friend's total score=207
EXAMPLE 5 Suppose we represent the distance above the ground by a positive integer
and that below the ground by a negative integer, then answer the following
An elevator descends into a mine shaft at the rate of 5 metre per minute. What will
be its position after one hour?
(m) If it begins to descend from 15 m above the ground, what will be its position after 45
minutes?
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4
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Answer 1

Answer:

(i) Displacement = Velocity x Time = -5 m/min x 60 min = -300 m.

(ii) 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 m.