A block of mass m rests on top of a bloc...

A block of mass m rests on top of a block of mass 2m which ls kept on a table. The coefficient of kinetic friction between all surfaces is `mu = 1 A` massless string is connected to each mass and wraps halfway around a massless pulley, as shown. Assume that you pull on the pulley with a force of 6 mg. What ls the acceleration of your hand ?

`(g)/(2)`

2 g

`(5g)/(4)`

`(4g)/(5)`

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