As a descending elevator approaches the correct floor, it slows to a stop with a constant acceleration of magnitude 1m/s*2. The
elevator descends 4.5m while it is slowing. We want to find how many seconds the elevator takes to slow to a stop.
Which kinematic formula would be most useful to solve for the target unknown?
Which kinematic formula would be most useful to solve for the target unknown?
1 answer:
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Answer:
3.56 m
Explanation:
As the object falls from height h, and then compresses the spring a distance of 0.66m, its initial potential energy is converted into elastics energy of the spring.
Let g = 9.81m/s2. Knowing that the total change in potential height is h + d, we have the following equation