1. A projectile is fired at an angle of 45 degrees above the horizontal. Assume that air resistance is not significant.  While the projectile is in flight, the horizontal component of the velocity remains constant. True or False

2. A machine launches a tennis ball at an angle of 25 degrees above the horizontal at a speed of 14 meters per second. Ball returns to level ground. Which combination of changes must produce an increase in time of flight of a second launch

a. increase the launch angle and decrease the ball's initial speed
b. increase the launch angle and increase the ball's initial speed
c. decrease the launch angle and decrease the ball's initial speed
d. decrease the launch angle and increase the ball's initial speed