Question

A hockey puck wont slide very far on concrete or asphalt, but it will slide for a very long time on ice. Why is this?

Answer 1

Concrete and Asphalt are much rougher surfaces and have a higher coefficient of friction because they generate more resistance to an object in motion. Ice has less friction and less energy is lost to heat, causing the puck to slide much further.

Answer 2

When hockey players push the puck along the ice it slides causing heat which melts the ice causing the friction against the ice to be less.