When is the elevator speeding up? When is it slowing down?At t = 20 s, is the elevator moving up, moving down, or at rest? What about at t = 35 s? Whatabout at t = 72 s? Imre steps onto the elevator in a skyscraper. He finds a scale that someone has left on the floor, anddecides to stand on it for a few minutes while other people direct the elevator to various floors. Thescale's reading is plotted below as a function of time. At time t = 0, the elevator hasn't started movingyet. (For the problem's below, keep in mind that a scale's reading tells you about the normal forceexperienced by the person standing on it.)800700Fr600Scale Reading [newtons]5004000102030 40 50 60Time [seconds]70

Given that: Here the scale reads the normal force exerted on the person.

Answered: Imre steps onto the elevator in a…

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