sung rolls a marble off the edge of a table. she rolls the marble off the same table again but at a…

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? the marble’s horizontal and vertical velocities change. the marble’s horizontal and vertical velocities remain the same. the marble’s vertical velocity changes, but its horizontal velocity does not. the marble’s horizontal velocity changes, but its vertical velocity does not.

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? the marble’s horizontal and vertical velocities change. the marble’s horizontal and vertical velocities remain the same. the marble’s vertical velocity changes, but its horizontal velocity does not. the marble’s horizontal velocity changes, but its vertical velocity does not.

Answer

Brief Explanations:

In projectile - motion, the vertical motion is affected by gravity and the initial vertical velocity is zero when the marble leaves the table (assuming it is rolled horizontally). The horizontal motion is a uniform - motion with no horizontal acceleration. Changing the speed at which the marble is rolled changes the horizontal velocity, while the initial vertical velocity remains zero (and the vertical acceleration is due to gravity and is constant).

Answer:

The marble's horizontal velocity changes, but its vertical velocity does not.