First a warm up about vectors... Can a vector have nonzero magnitude if a component is zero? If no, why not? If yes, give an example. Can a vector have zero magnitude and a nonzero component? If no, why not? If yes, give an example. For a projectile, which of the following quantities are constant during flight? The horizontal displacement, the vertical displacement, the horizontal component of velocity, the vertical component of velocity, the velocity, the horizontal component of acceleration, the vertical component of acceleration, the acceleration. Justify your reasoning. A baseball player throws a ball up at a 40 degree angle with respect to the ground. The ball lands on the ground some distance away. Is there any point on the trajectory where velocity and acceleration are parallel to each other? If so, where? Is there any point where velocity and acceleration are perpendicular to each other? If so, where? A person trying to throw a ball as far as possible will run forward during the throw. Explain why this increases the distance of the throw. A tiger leaps horizontally from a 7.5 m high rock with a speed of 4.5 m/s. How far from the base of the rock will she land? A diver running 1.6 m/s dives out horizontally from the edge of a vertical cliff and reaches the water below 3.0 s later. How high was the cliff and how far from its base did the diver hit the water? A ball is thrown horizontally from the roof of a building 56 m tall and lands 45 m from the base. What was the ball's initial speed? A projectile is fired with an initial speed of 75.2 m/s at an angle of 34.5 degrees above the horizontal on a long flat firing range. Determine... The maximum height reached by the projectile The total time in the air The total horizontal distance covered (that is, the range) The velocity of the projectile 1.5 s after firi