Uma bola de tênis rola sobre uma mesa horizontal com velocidade constante de 3m/s após sair da mesa cai e atinge o solo a 1,20m de distância dos pés da mesa desprezando a interferencia do ar e adotando g=10m/s calcule: o tempo gasto para que a bola de tênis atinja o solo

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.