Answer
$2.626m/s^{2}$
Work Step by Step
$Tsin15^{\circ}=ma$
$Tcos15^{\circ}=mg$
Therefore, from above 2 equations, $tan15^{\circ}=\frac{a}{g}$
$a=gtan15^{\circ}=2.626m/s^{2}$
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