A lamp hangs vertically from a cord in a descending


A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.4 m/s2.

(a) If the tension in the cord is 86 N, what is the lamp's mass?

(b) What is the cord's tension when the elevator ascends with an upward acceleration of 1.4 m/s2?

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Physics: A lamp hangs vertically from a cord in a descending
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