A pulley fixed to the ceiling carries a string with blocks of mass m and 3m. The masses of pulley and string are negligible. What is the acceleration of the centre of mass?
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In right triangle trigonometry (for acute angles only), the tangent is defined as the ratio of the opposite side to the adjacent side. The unit circle definition is tan(theta)=y/x or tan(theta)=sin(theta)/cos(theta).
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