28. Melissa's favorite exercise equipment at the gym consists of various springs. In one exercise, she pulls a handle grip attached to the free end of a spring to 0.80 m from its unstrained position. The other end of the spring (spring constant = 45 N/m) is held in place by the equipment frame. What is the magnitude of the force that Melissa is applying to the handle grip? A) 29 N B) 36 N C) 42 N D) 54 N E) 66 N 29. When a force of 19 N is applied to a spring, it elongates 0.085 m. Determine the period of oscillation of a 4.0-kg object suspended from this spring. A) 0.8 s B) 1.2 s C) 3.1 s D) 4.1 s E) 6.3 s

28. Melissa's favorite exercise equipment at the gym consists of various springs. In one exercise, she pulls a handle grip attached to the free end of a spring to 0.80 m from its unstrained position. The other end of the spring (spring constant = 45 N/m) is held in place by the equipment frame. What is the magnitude of the force that Melissa is applying to the handle grip? A) 29 N B) 36 N C) 42 N D) 54 N E) 66 N 29. When a force of 19 N is applied to a spring, it elongates 0.085 m. Determine the period of oscillation of a 4.0-kg object suspended from this spring. A) 0.8 s B) 1.2 s C) 3.1 s D) 4.1 s E) 6.3 s