Una estatua de oro de 15 Kg está atada a un hilo que cuelga de una superficie. Si la estatua está sumergida en agua y es levantada por una fuerza boyante, halle el volumen de la figura y el peso de la figura. El valor de la fuerza boyante. La tensión del hilo sujeto a la estatua

Newtons laws of motion

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

There was no intial y-momentum so the net final y-momentum must also be 0. they can have final velocities in the y-direction