A 050-Kg Block Attached to an Ideal Spring with a Spring

Multiple Choice

A 0.50-kg block attached to an ideal spring with a spring constant of 80 N/m oscillates on a horizontal frictionless surface.When the spring is 4.0 cm longer than its equilibrium length, the speed of the block is 0.50 m/s.The greatest speed of the block is:

A) 0.32 m/s
B) 0.55 m/s
C) 0.71 m/s
D) 0.87 m/s
E) 0.93 m/s