PRELIMINARY QUESTIONS A tossed ball moving vertically up and down in the air and a cart sliding smoothly (that is, without friction or air resistance) on an inclined plane both move in one dimension; if the pendulum is not displaced too far from equilibrium (or if its horizontal oscillation only is considered) it also moves only in one dimension. What do the movements of these three objects have in common? What is the shape of a velocity vs. time graph for any object that has a constant acceleration? (Describe in words, perhaps supplemented with a graph sketched with labeled axes.) Do you think that any of the three objects considered above (tossed ball, sliding cart, swinging pendulum) has a constant acceleration? If so, which one(s)? Consider a ball thrown straight upward. It moves up, changes direction at the top of its path, and falls back down. What is the acceleration of the ball as it moves upward? What is the ball's acceleration when it reaches its topmost point (turning point)? What is the ball's acceleration as it moves downward?

PRELIMINARY QUESTIONS A tossed ball moving vertically up and down in the air and a cart sliding smoothly (that is, without friction or air resistance) on an inclined plane both move in one dimension; if the pendulum is not displaced too far from equilibrium (or if its horizontal oscillation only is considered) it also moves only in one dimension. What do the movements of these three objects have in common? What is the shape of a velocity vs. time graph for any object that has a constant acceleration? (Describe in words, perhaps supplemented with a graph sketched with labeled axes.) Do you think that any of the three objects considered above (tossed ball, sliding cart, swinging pendulum) has a constant acceleration? If so, which one(s)? Consider a ball thrown straight upward. It moves up, changes direction at the top of its path, and falls back down. What is the acceleration of the ball as it moves upward? What is the ball's acceleration when it reaches its topmost point (turning point)? What is the ball's acceleration as it moves downward?