a. A car travels 20 meters per second, and the driver steps on the brake.
d. An object is dropped vertically toward the ground.
In which of the following situations do unbalanced forces act? a. A car travels 20 meters per second, and the driver steps on the brake. b. A chair is dragged across a floor at constant velocity. c. A plane makes a turn at a constant speed. d. An object is dropped vertically toward the ground.
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