12. A 4.0 kg mass is attached to an unstretched vertical spring with a spring constant of 80 N/m.lt then released from t

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12 A 4 0 Kg Mass Is Attached To An Unstretched Vertical Spring With A Spring Constant Of 80 N M Lt Then Released From T 1 (25.41 KiB) Viewed 10 times

12. A 4.0 kg mass is attached to an unstretched vertical spring with a spring constant of 80 N/m.lt then released from the unstretched position and performs vertical oscillations under gravity. What i the maximum speed of the mass? A) 0.99 m/s. B) 1.55 m/s. C) 3.10 m/s. D) 2.19 m/s. E) 4.47 m/s. 13. A mass-spring system of mass 0.2 kg and a spring constant of 115 N/m is oscillating on a frictionless horizontal table with an amplitude of 0.15 m. At time t = 0, the mass passes through the equilibrium position r = 0 and is moving to the right. Which of the following describes the velocity (t) as a function of time? A) v(t) = 0.15 cos(240) B) v(t) = 3.6 cos(240) C) v(t) = 3.6 cos(301) D) (t) = 0.15 cos(115) E) () = 0.15 cos(30+)