A constant horizontal pull acts on a sled on a horizontal frictionless ice pond, The sled starts from rest. When the pull acts distance x, the sled acquires a speed v and a kinetic energy K. If the same pull instead acts over twice this distance, A the sled's speed will be : v \\/ 2 and its kinetic energy will be | K / 2 B the sled's speed will be 2v and its kinetic energy will be 2K. C the sled's speed will be 4v and its kinetic energy will be 2K. D the sled's speed will be 2v and its kinetic energy will be K / 2 E the sled's speed will be v : 2 : and its kinetic energy will be 2K