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

Question

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

Quizplus · Accepted Answer

The Answer of 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

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