___________ An air hockey puck is thrown horizontally and slides across the air hockey table (with air on) at a constant speed. Which of the following must be true about the forces acting on the puck

(A) There is no force to the right and the frictional force is zero or nearly zero. (B) The force to the right is larger than the frictional force. (C) The force of motion is proportional to the speed of the puck. (D) The force to the right must be equal to the force from friction.