Two second-period goals by the Minnesota North Stars' Brian Lawton ended a 1-1 tie and Team USA went on to a 3-2 victory over Czechoslovakia last night in Buffalo in the Canada Cup hockey tournament.

Lawton knocked a rebound out of the air past goalie Dominik Hasek to give the U.S. team the lead and scored the winning goal eight minutes later on a setup by Bobby Carpenter of the Washington Capitals.

Neal Broten, who also plays for the National Hockey League's North Stars, scored in the first period. Vincent Lukac scored both goals for Czechoslovakia.

The victory gave the U.S. a 2-0-1 record in the six-nation, round-robin tournament; the Czechoslovaks dropped to 0-2-1.

Team USA scored on its first shot of the game, on a play worked by the Broten brothers, Neal and Aaron.

A pass from Bryan Erickson in the slot was behind Aaron Broten but, in one motion, he took the pass and shot across to his brother standing alone for the easy redirection behind Hasek.

The Czechoslovaks, stymied by goalie Tom Barrasso early in the game, turned things around by the end of the first period. They tied it when Lukac took a pass in the deep slot from Igor Liba and scored.

Lawton, the first pick in the 1983 NHL draft, broke the tie early in the second period. Carpenter reached a missed deflection by Lawton and sent a pass back to him for the goal.