A ball of mass 690 g hangs from a spring whose stiffness is 115 newtons per meter. A string attached to the ball, and you are pulling the string to the right so that the ball hangs motionless. In this situation, the spring is stretched, and its length is 15 cm.
A) 0.58 m
B) 0.45 m
C) 0.30 m
D) 0.15 m
