Superman, it is said, is able to leap over tall buildings with a single bound. Suppose he bounds upward with an initial velocity of 400 m/s (faster than a speeding bullet) at an angle of 80° from the horizontal. a) How tall a building can he leap over? b) How far from his starting point will he land?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.