Question

which would fall with greater acceleration in a vacuum—a bowling ball or a feather? the feather they would accelerate at the same rate. the bowling ball it is difficult to determine without more information.

Explanation:

In a vacuum, there is no air - resistance. According to Newton's second law $F = ma$ and the gravitational force formula $F=mg$, the acceleration $a = g$ for all objects near the Earth's surface, regardless of mass. So a bowling ball and a feather would accelerate at the same rate.

Answer:

B. They would accelerate at the same rate.