Answer :
At 150 meters per second, the ball covers 15 meters every 1/10 of a second.
When it swooshes by her, it's 15 meters from you. Beginning at that time, the
distances from you at subsequent intervals of 1/10 second are 30, 45, 60, 75, etc.
That's choice-'D'.
Note that only the horizontal distance from you is reflected. The drop of the paintball
under the influence of gravity is utterly and completely ignored.
When it swooshes by her, it's 15 meters from you. Beginning at that time, the
distances from you at subsequent intervals of 1/10 second are 30, 45, 60, 75, etc.
That's choice-'D'.
Note that only the horizontal distance from you is reflected. The drop of the paintball
under the influence of gravity is utterly and completely ignored.