Disregarding air resistance, what is the speed of a ball dropped from 12 feet just before it hits the ground? (Use 1 ft = 0.30 m, and use g = 9.8 m/s2.)

Convert the drop height: 12 ft × 0.30 m/ft = 3.6 m. Starting from rest and ignoring air resistance, use v² = 2gh, so v = √(2 × 9.8 × 3.6) = 8.4 m/s. The correct choice is 8.4 m/s.

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