A Hockey Puck Slides Across a Frozen Pond

Multiple Choice

A hockey puck slides across a frozen pond.If ice friction and air resistance are neglected,the force needed to keep the puck sliding at constant velocity is

A) 0 N.
B) equal to the weight of the puck.
C) the weight of the puck divided by the mass of the puck.
D) the mass of the puck multiplied by 10 m/s².
E) none of the above