\fI Review . V P r A A cannon on a flat railroad car travels to the a t east with its barrel tilted 30 above horizontal. It fires a cannonball at 50 m/s. At t = O s, the car, starting from rest, begins to accelerate to the east at 2.0 m/s2. At what time should the cannon be fired to hit a target on the tracks that is 400 m to the east of the car's initial position? Assume that the cannonball is fired from ground level. Express your answer with the appropriate units. t = 0.0083 3 Submit Previous Answers Quest Answer / x Incorrect; Try Again; 2 attempts remaining Provide Feedback Next >