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SAT® Subject Test in Physics

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Moderate

Purple and Red Projectiles

SATPHY-0FXSX1

A purple ball rolls off a horizontal table with an initial speed of $3.0 \ m/s$. A red ball rolls off the same table with an initial speed of $1.5\ m/s$. Both balls fly unhindered toward the horizontal floor that they hit at some horizontal distance from the edge of the table.

How does the horizontal distance for the purple ball compare to the horizontal distance for the red ball?

A

The horizontal distance for the purple ball is twice as much as that for the red ball.

B

The horizontal distance for the purple ball is the same as the horizontal distance for the red ball.

C

The horizontal distance for the purple ball is four times as much as that for the red ball.

D

The horizontal distance for the purple ball is half as much as that for the red ball.

E

We need to know the relative masses of the balls to answer this question.