After a shell explodes at the top of its trajectory,the center of gravity of the fragments has an acceleration,in the absence of air resistance,
A)of less than g downward.
B)equal to g and downward.
C)greater than g and downward.
D)of g downward plus a forward component.
E)of g downward plus a backward component.

Question

Quizplus · Accepted Answer

In the absence of air resistance, the acceleration of the center of gravity of the fragments is only influenced by the gravitational force acting on them, which is equal to g and directed downward. Therefore, the best choice is B, which states that the acceleration is equal to g and downward.

After a Shell Explodes at the Top of Its Trajectory,the