The system shown in Fig. 14.17 is mounted in an elevator. What happens to the period of the motion (does it increase, decrease, or remain the same) if the elevator

(a) Accelerates upward at 5.0 m/s²;

(b) Moves upward at a steady 5.0 m/s;

(c) Accelerates downward at 5.0 m/s²?

Justify your answers.

Fig.14.17

Transcribed Image Text:

(c) If the body is displaced from equilibrium, the net force on the body is proportional to its displacement. The oscillations are SHM. (a) (b) A body is suspended from the spring. It is in equilibrium when the upward force exerted by the stretched spring equals the body's weight. ΔΙ A hanging spring that obeys Hooke's law F= k(ΔΙ -) F = kAI mg mg