Sung rolls a marble off the edge of a table. She rolls the marble off the same table again but at a different speed. Which best describes the projectile motion of the marble as it leaves the table at the two different speeds?
Answer
A
The marble’s horizontal velocity changes, but its vertical velocity does not.
B
The marble’s vertical velocity changes, but its horizontal velocity does not.
C
The marble’s horizontal and vertical velocities remain the same.
D
The marble’s horizontal and vertical velocities change.