1. A projectile, fired at an angle of 45 to the ground, takes 3 s to reach the top of its path. (a) How long does it travel before it hits the ground? (b) What acceleration does the projectile have? (c) What effect will increasing the angle at which the projectile is fired have on the horizontal component of the velocity of the projectile? (d) What effect will increasing the angle at which the projectile is fired have on its acceleration