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26/10/2021 5:45 pm
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The speed-time graph of an ascending passenger lift is given alongside. What is the acceleration of the lift:
(i) during the first two seconds?
(ii) between second and tenth second?
(iii) during the last two seconds?
1 Answer
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26/10/2021 5:55 pm
(i) Acceleration during first two seconds
= \(\frac{4.6-0}{2-0}\)
= 2.3 m/s2
(ii) Acceleration between second and tenth second is zero, since the velocity is constant during this time.
(iii) Acceleration during last two seconds
= \(\frac{0 - 4.6}{12-10}\)
= -2.3 m/s2