일반물리학 1 — Force and Motion-I: Problem 44

44 A lamp hangs vertically from a cord in a descending elevator that decelerates at \( 2.4 \text{ m/s}^2 \). (a) If the tension in the cord is \( 93 \text{ N} \), what is the lamp’s mass? (b) What is the cord’s tension when the elevator ascends with an upward acceleration of \( 2.4 \text{ m/s}^2 \)?