The England international scored in injury time to complete a routine victory for Mauricio Pochettino's men, with Nacer Chadli and Christian Eriksen also on the scoresheet
Some supporters boycotted the game in protest at the running of the club and a perceived lack of ambition from the board.
|VIEW FROM ST JAMES' PARK
|By Greg Lea
Tottenham fully deserved their 3-1 victory this afternoon, Mauricio Pochettino's side proving too strong for Newcastle.
Nabil Bentaleb and Paulinho were impressive in midfield, allowing Spurs to dominate possession and control the game, while goalscorers Nacer Chadli, Cristian Eriksen and Harry Kane all provided moments of quality further forward.
Aside from the opening five minutes of the second-half, Newcastle offered very little on their way to a sixth successive defeat. A seven-point cushion above the drop zone should be enough to see them safe, but it is turning into an abject season for John Carver's men.
Chadli gave Mauricio Pochettino's side a half-time lead with a long-range strike 29 minutes in, though Tim Krul might have done more to save the effort.
However, Newcastle equalised early in the second half - Colback restoring parity 18 seconds after the restart.
If there was any doubt about Krul's role in Spurs' first goal, there was nowhere for the goalkeeper to hide with the second, as Eriksen's 53rd-minute free-kick eluded the Dutchman's grasp and found the back of the net.
Kane's 30th goal of the campaign added to John Carver's woes, with Newcastle remaining just seven points clear of the relegation zone, while Spurs moved above Southampton into sixth.
Skipper Fabricio Coloccini returned from suspension and was required to snuff out an early Kane opportunity in a low-key opening 10 minutes on Tyneside.
Ayoze Perez had the first effort on target, side-footing a Yoan Gouffran cross at Michel Vorm, as Spurs initially struggled to convert their possession into clear-cut chances.
However, when Gouffran carelessly lost possession in midfield, Chadli made the most of the time and space afforded to him to fire past Krul and further dampen an already muted atmosphere.
Newcastle demonstrated a stark lack of attacking invention in the first half, but Carver introduced Sammy Ameobi and Gabriel Obertan at the break and the reshuffle paid dividends almost immediately when Colback levelled.
After Perez's perseverance, Daryl Janmaat saw a shot blocked before Colback steered home the loose ball inside a minute of the second half.
It was only Newcastle's second Premier League goal in six outings, but Newcastle quickly fell behind again when Krul failed to deal with Eriksen's curled delivery.
The Dane's free-kick evaded a host of Spurs players as well as the Newcastle goalkeeper to restore the visitors' advantage, before Nabil Bentaleb came close to heading home a third - grazing the roof of the net following Chadli's cross.
Krul atoned for his error by keeping out Kane's point-blank header, only to be beaten by the England striker's one-on-one finish in stoppage time as the hosts miserable day was completed.