posted by Tammy .
An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring is
I have narrowed down the choses to either c) d) or e). I don't really get this question.
The max KE of the block is 1/2Mv^2. The max PE of the spring is 1/2 k A^2
set them equal, and solve for k.