Particle AAA, of mass 4 kg, lies on a smooth horizontal table. It is connected by a light inextensible string passing over a smooth pulley at the edge of the table to a hanging particle B B\,B of mass m m\,m kg. After release, B B\,B accelerates downwards at 1.4 m s-2. Use g=9.8 m s−2g=9.8\text{ m s}^{-2}g=9.8 m s−2.
Find the tension in the string.
Find mmm.