1. A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet (assume a uniform acceleration).

2. A plane has a takeoff speed of 88.3 m/s and requires 1,365 meters to reach that speed. Determine the acceleration of the plane and the time required to reach this speed.

3. A ball is thrown horizontally from the roof of a building 45 meters high and lands to the ground 24 meters away from the base of the building. What was the ball's initial horizontal speed?