An iron cannonball and a bowling ball are dropped at the same time from the top of a building. at the instant before the balls hit the sidewalk, the heavier cannonball has a greater? a. velocity. b. aceleration. c. kinetic energy. d. all of these are the same for the two balls.

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.