A puck of mass 30g slides across rough ice, experiencing a frictional force of 0.2N. If it was moving at 10km/h when it hit the ice patch, how long did it take to stop? How long was the ice patch?
The Attempt at a Solution
I don't think this question is solvable or make any sense. If it hits something, it stops instantly, but the answers say 0.42 seconds.