How much wood could a woodchuck chuck if the wood was on a train (let's call it train A) that left Los Angeles for Detroit in 5 AM at a speed of 40 MPH, when at the same time, another train (let's call this one train B) left Detroit for Los Angeles in 4 AM at a speed of 50 MPH? (The woodchuck can chuck 500 grams of wood/minute)