In a riveting and apparently infuriating game of croquet, Pi…
In a riveting and apparently infuriating game of croquet, Pierre and Regnault launch their identical croquet balls, which have masses of 0.45 kg each, at each other instead of the wickets. Pierre fires his north at a speed of 5 m/s, and Regnault sends his south at a speed of 7 m/s. The balls collide midair, sending Regnault’s ball directly east at a speed of 4 m/s. In what direction does Pierre’s ball go after the collision?