A 20-Kg Mass Is Fastened to a Light Spring (K

Multiple Choice

A 20-kg mass is fastened to a light spring (k = 380 N/m) that passes over a pulley as shown.The pulley is frictionless,and the mass is released from rest when the spring is unstretched.After the mass has dropped 0.40 m,what is its speed?

A) 2.2 m/s
B) 2.5 m/s
C) 1.9 m/s
D) 1.5 m/s
E) 3.6 m/s