Created by StemPy LabWhich of these position-time graphs can never describe a real moving body?
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← A lift goes from the 2nd floor, 6 m above the ground, up to the 9th floor, 27 m above the ground, in 15 s. Without stopping, it then goes down to the ground floor in 18 s. Taking upwards as positive, what is its average velocity for the whole trip?A particle moves along the x axis with x = t³ - 3t (SI units). At what time is its instantaneous velocity equal to its average velocity over the first 2 s? →
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