An object A of mass 4kg is connected via a light string of a negligible mass over a light frictionless pulley of object B with a mass of 2kg l. Object A slides horizontally on a rough surface while object B slides vertically downwards at 3 meters per second square as shown in the diagram velow
"T_1=m_1(g+a)=52~N,"
"T_2=m_2(g-a)=14~N."
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