A particle P of mass 4kg rests on horizontal ground and is attached by a light,inexxtensible string to another particle Q of mass 4.5kg. The string passes over a smooth pulley whose center is 3m above the ground.Initially Q is 1.1m below the level of the center of the pulley.The system is released from rest in this position.
a)find the acceleration of the two particles
B) find the speed wit which Q hits the ground