a ball is thrown vertically upward from the 12m level with an initial velocity of 18m/s. at that instant, an open elevator pases the 5m level moving upward with constant velocity of 2m/s. find the relative velocity of the ball w.r.t. elevator when the ball hits the elevator?
a ball is thrown vertically upward from the 12m level with an initial velocity of 18m/s. at that instant, an open elevator pases the 5m level moving upward with constant velocity of 2m/s. find the relative velocity of the ball w.r.t. elevator when the ball hits the elevator?