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

Question

Quizplus · Accepted Answer

If both ice friction and air resistance are neglected, there are no other forces acting on the puck except for its own inertia (Newton's first law) which allows it to continue sliding at a constant velocity without the need for an external force. Therefore, the force needed to keep the puck sliding at constant velocity is 0 N.

A Hockey Puck Slides Across a Frozen Pond