A marble is attached to a compressed horizontal spring and is then released. Which equation correctly shows the conservation of mechanical energy for this system? (1 point) Responses mgh=12kx2 mg h is equal to 1 half k x squared 12mv2=12kx2 1 half m v squared is equal to 1 half k x squared 12mv2=kx2 1 half m v squared is equal to k x squared mgh=kx2
