In the sport of curling, popular in Canada and Ireland, a player slides a 20.0-kg granite stone

Question:

In the sport of curling, popular in Canada and Ireland, a player slides a 20.0-kg granite stone down a 38-mlong ice rink. Draw FBDs for the stone
(a) While it sits at rest on the ice;
(b) While it slides down the rink;
(c) During a head-on collision with an opponent's stone that was at rest on the ice.