Scotland had lost to the USA on Tuesday night, with Murdoch delighted at his rink's response.
"We were very disappointed with the loss last night, considering that we dominated the game," said Murdoch.
"For us, it was just a case of taking some of that anger out this morning.
"We were pretty frustrated after that game and we thought we’d really need to get up for this game.
"To put Norway down to four losses was our intention, and to really come out firing - showing that real will to win and showing the form we’re playing, because we’ve been playing really well."
Murdoch moves level with hosts Canada, for whom Brad Jacobs suffered a surprise second defeat of the Championships by going down 10-8 in the extra end to Japan’s Yusuke Morozumi.
Japan had never beaten Canada in five attempts, but scored a pair of three-enders before Jacobs forced the extra end. Canada now slip to 6-2.
"I personally curled terrible, horrible, handed them two threes all by myself,” Jacobs said.
"When your skip’s curling like that, you’re not going to win many games. I can’t even believe it went to an extra end. Ah, well, that’s curling sometimes."
Other clashes saw Switzerland beat Denmark 7-4 and the USA beat Finland 7-6.
Canada have an opportunity to go it alone at the top with a later encounter with Russia. Switzerland also face China, while the Czechs face Finland and Norway have a Scandinavian derby with Sweden.
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- Brad Jacobs