Part A The graph of displacement vs. time for a small mass m at the end of a spring is shown in the figure (Figure 1). At t = 0, x = 0.43cm. If m = 8.5 g , find the spring constant, k. Express your answer using two significant figures. k = 0.70 N/m Submit Previous Answers Correct Part B Write the equation for displacement x as a function of time t, where t in seconds. Figure x = (0.43 cm) · cos(9.1 ·t +1.0) 1 of 1 x = (0.82 cm) · cos(9.1 ·t +1.0) x = (0.82 cm) · cos(9.1 ·t – 1.0) 0.82 cm 0.82 cm 0.43 cm O x= (0.43 cm) · cos(9.1 ·t – 1.0) Submit Previous Answers Request Answer -0.69 s-

Part A The graph of displacement vs. time for a small mass m at the end of a spring is shown in the figure (Figure 1). At t = 0, x = 0.43cm. If m = 8.5 g , find the spring constant, k. Express your answer using two significant figures. k = 0.70 N/m Submit Previous Answers Correct Part B Write the equation for displacement x as a function of time t, where t in seconds. Figure x = (0.43 cm) · cos(9.1 ·t +1.0) 1 of 1 x = (0.82 cm) · cos(9.1 ·t +1.0) x = (0.82 cm) · cos(9.1 ·t – 1.0) 0.82 cm 0.82 cm 0.43 cm O x= (0.43 cm) · cos(9.1 ·t – 1.0) Submit Previous Answers Request Answer -0.69 s-