# physics

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A lamp hangs vertically from a cord in a descending elevator that decelerates at 2.6 m/s2. (a) If the tension in the cord is 54 N, what is the lamp's mass? (b) What is the cord's tension when the elevator ascends with an upward acceleration of 2.6 m/s2?

• physics -

Tension=mg+ ma= m(g+a) where a is + going up.

• physics -

Hey I do no know

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