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 marbles horizontal and vertical velocities change. the marbles horizontal and vertical velocities remain the same. the marbles vertical velocity changes, but its horizontal velocity does not. the marbles 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 marbles horizontal and vertical velocities change. the marbles horizontal and vertical velocities remain the same. the marbles vertical velocity changes, but its horizontal velocity does not. the marbles 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 usually zero (when rolled horizontally off a table). The horizontal motion is a uniform - motion with no horizontal acceleration (neglecting air resistance). Changing the speed at which the marble is rolled horizontally only affects the horizontal velocity. The vertical velocity is determined by the acceleration due to gravity and the time of fall, which are not affected by the horizontal speed.

Answer:

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